Admitting suffering, cook ruffled (6)
I believe the answer is:
frilly
'ruffled' is the definition.
('frilly' can be a synonym of 'ruffled')
'admitting suffering cook' is the wordplay.
'admitting' means one lot of letters goes inside another.
'suffering' becomes 'ill'.
'cook' becomes 'fry' (I've seen this before).
'ill' placed inside 'fry' is 'FRILLY'.
(Other definitions for frilly that I've seen before include "Fancy" , "Having flounces, ruffles, etc" , "ruffled" .)