Causing laughter, stripper at last able to be seen topless (7)
I believe the answer is:
risible
'causing laughter' is the definition.
(risible can mean laughable or ridiculous)
'stripper at last able to be seen topless' is the wordplay.
'at last' suggests the final letters.
'able to be seen' becomes 'visible' (something visible can be seen).
'topless' means to remove the first letter.
The last letter of 'stripper' is 'r'.
'visible' with its first letter taken off is 'isible'.
'r'+'isible'='RISIBLE'
(Other definitions for risible that I've seen before include "Absurd" , "Comical, laughable" , "Farcical" , "Laughable, amusing" , "Laughable, really ridiculous" .)