Decline with little hesitation (6)
I believe the answer is:
wither
'decline' is the definition.
(I've seen this before)
'with little hesitation' is the wordplay.
'little hesitation' becomes 'er' (expression of hesitation).
'with'+'er'='WITHER'
(Other definitions for wither that I've seen before include "Writhe (anag.)" , "Shrivel and decay" , "Waste" , "Lose moisture and die" , "Become shrivelled, lose freshness" .)