Given how long this has been sat here, I'm not going to bother spoilering.
The main point here is a pun on the game Contact. What we're looking at is a series of Contact games, and the defenders' words constitute the message. The "..." separate Contact clues, leading to successive words passed by the defender; in each game the last word passed is the defender's actual word, which is a word of our message. Like this:
First game: defending G.
Green pot -> (something beginning G). Defending GE.
Place of Agony? -> GETHSEMANE. Defending GET.
Obtain -> GET, the defender's word. First word of message is GET.
Second game: defending R.
Perhaps the moment of T -> (something beginning R). Defending RE.
French meet -> RENDEZVOUS. Defending REA.
Prepared -> READY, the defender's word. Second word of message is READY.
Third game: defending N.
Quoth the raven -> NEVERMORE. Defending NO.
! -> NOT. Defending NOW.
Stole back -> NOW, the defender's word. Third word of message is NOW.
Fourth game: defending W.
Verse: Jesus ____ -> WEPT. Defending WE.
UI? -> WE, the defender's word. Fourth word of message is WE.
Fifth game: defending A.
#unintentional -> ART. Defending AT.
1x(um um um) -> ATRIUM. Defending ATT.
1 ppin? -> ATTACK, the defender's word. Fifth word of message is ATTACK.
The separators are ..... instead of ... at word boundaries. The "brief pause" presumably indicates a sentence boundary. So the message, in full, is "GET READY. NOW WE ATTACK."
The less-obvious clues: the "Agony" is that of Jesus, as reported in the New Testament, shortly before his betrayal and execution; the Raven is from Poe's poem; "!" means "not" in some programming languages; NOW is WON backwards; "Jesus wept" is famously the shortest verse in the Bible; "UI?" is (not a feeble sounds-like, as I thought; credit to Deusovi for pointing out a better explanation in comments) you+I, hence we; #unintentionalart is a hashtag used on Twitter, Tumblr etc. for images of things that have aesthetic merit by accident rather than design; 1x(um um um) is a tri-"um"; 1 ppin = 1 ttack = attack.
I don't know what "Green pot" is cluing, other than that it begins with G. Nor "Perhaps the moment of T" (though for that one I can dig up a few possibilities; e.g., if T is short for "truth" then it could be REVELATION, or Francesco ROSI who made a movie called "The moment of truth"). And OP informs me in comments that my solution to #unintentional is, er, #unintentional.
... to Deusovi for giving a much better explanation of "UI?" than mine. And to OP for reminding me to look at the .../..... distinction, which I had in fact noticed but then hadn't paid any attention to. Duh!