Faces drop during struggles (7)
I believe the answer is:
visages
'faces' is the definition.
(visage is a kind of face)
'drop during struggles' is the wordplay.
'drop' becomes 'sag' (sagging is a kind of dropping).
'during' means one lot of letters goes inside another.
'struggles' becomes 'vies' (I've seen this in other clues).
'sag' put inside 'vies' is 'VISAGES'.
(Other definitions for visages that I've seen before include "Human faces" , "Appearances" .)