My first is fruit,
last is knuckle substitute,
middle one is space so small,
but I am ignorant overall.
note : OnlyF got the first part correct
(The final word does not have any abbreviation or short cut, it uses word as it is )
Hint :
me and my friend were playing the "guess me game" : this is how questioning (and answering) went :
umm... fruit : yes
easily available fruit? : yes
related to home? : In a way, yes
what about drinks? : Yaasss
Daiquiri?? : no
martini?? : no, but close
superhero? : yes
from DC? : no
marvel then? : nope