Cover emerging from hassle eventually (6)
I believe the answer is:
sleeve
'cover' is the definition.
'emerging from hassle eventually' is the wordplay.
'emerging from' says the answer is hidden in the clue.
'SLEEVE' is hidden in the letters of 'hassle eventually'.
(Other definitions for sleeve that I've seen before include "with something to hide?" , "Possibly hiding-place for ace" , "It covers the arm" , "Part of a shirt or jacket" , "Covering for arm or record" .)