Perform in Clacton (3)
I believe the answer is:
act
'perform' is the definition.
(acting is a kind of performing)
'in clacton' is the wordplay.
'in' indicates a hidden word.
'ACT' is hidden within 'clacton'.
(Other definitions for act that I've seen before include "Produce an effect" , "Ordinance" , "turn" , "Perform - part of a play" , "Assumed attitude" .)