Feeling of irritation in suit, chafing (4)
I believe the answer is:
itch
'feeling of irritation' is the definition.
'in suit chafing' is the wordplay.
'in' indicates a hidden word.
'ITCH' can be found hidden inside 'suit chafing'.
(Other definitions for itch that I've seen before include "Teasing desire" , "Burning" , "Irritate" , "Prickle" , "cause irritation" .)