And an even longer clue: tolerating a look at her belly.
Endure glance on navel?
The answer is an anagram of the clue
$~~~~~~~$ AND AN EVEN LONGER CLUE $~~=~~$ ENDURE GLANCE ON NAVEL.
To endure is to tolerate, and a "look at the belly" could be a "glance on navel".
I admit I had an anagram generator help me a little (not completely), so apologies if that's considered cheating.