Unfortunately too vain for applause (7)
I believe the answer is:
ovation
'applause' is the definition.
(I've seen this before)
'unfortunately too vain' is the wordplay.
'unfortunately' indicates anagramming the letters.
'too'+'vain'='toovain'
'toovain' anagrammed gives 'OVATION'.
'for' is the link.
(Other definitions for ovation that I've seen before include "Too vain (anag)" , "Long bout of applause" , "Some will stand for it" , "Stormy applause" , "Enthusiastic applause, may be given standing" .)