OAP mate turned up naked in Florida resort (5)
I believe the answer is:
tampa
'florida resort' is the definition.
(I've seen this before)
'oap mate turned up naked' is the wordplay.
'naked' indicates the answer is hidden within the clue (with the letters around the hidden word taken off).
'turned up' says the letters should be written in reverse.
'apmat' is hidden in the letters of 'oap mate'.
'apmat' in reverse letter order is 'TAMPA'.
'in' acts as a link.
(Other definitions for tampa that I've seen before include "Port of western Florida" , "American city" , "American resort" , "US city" , "Resort in W. Florida" .)