Club entertainer ultimately impresses tourist (8)
I believe the answer is:
stripper
'club entertainer' is the definition.
(entertainer at a strip club)
'ultimately impresses tourist' is the wordplay.
'ultimately' says to take the final letters.
'tourist' becomes 'tripper' (tripper is a kind of tourist).
The last letter of 'impresses' is 's'.
's'+'tripper'='STRIPPER'
(Other definitions for stripper that I've seen before include "Waterproof boot" , "performer barely seen" , "One removing clothes" , "Exotic dancer" , "Her act is a revelation" .)