Lets on about being hot (6)
I believe the answer is:
'hot' is the definition.
(eg stolen goods are 'hot')
'lets on about' is the wordplay.
'about' indicates an anagram.
'letson' anagrammed gives 'STOLEN'.
'being' acts as a link.
(Other definitions for stolen that I've seen before include "Taken unlawfully" , "subject to plagiarism" , "plagiarised?" , "Illegally taken" , "Pilfered" .)