Star mark for tropical resort? (7)
I believe the answer is:
sunspot
'tropical resort?' is the definition.
'star mark' is the wordplay.
'star' becomes 'sun' (Sun is an example).
'mark' becomes 'spot' (spotting is a kind of marking**).
'sun'+'spot'='SUNSPOT'
'for' acts as a link.
(Other definitions for sunspot that I've seen before include "cause of magnetic storm" , "Solar dark patch" , "Dark cool patch on the surface of our nearest star" , "holiday resort" , "Cool solar area" .)