PC in seaside resort doffing cap (5-2)
I believe the answer is:
right on
'pc' is the definition.
(I've seen this before)
'seaside resort doffing cap' is the wordplay.
'seaside resort' becomes 'Brighton'.
'doffing cap' means to remove the first letter (the word's head or 'cap' is removed).
'brighton' with its initial letter removed is 'RIGHT-ON'.
'in' is the link.
(Other definitions for right on that I've seen before include "politically correct?" , "Trendy and socially aware" , "Excellent" , "American exclamation of approval" , "Exactly" .)