Pavarotti for one bought enormous trousers (5)
I believe the answer is:
tenor
'pavarotti' is the definition.
(Luciano Pavarotti of the Three Tenors)
'for one bought enormous trousers' is the wordplay.
'trousers' says the answer is hidden in the clue (trouser can mean to steal or take).
'TENOR' is hidden in the letters of 'for bought enormous'.
(Other definitions for tenor that I've seen before include "Singer; drift" , "Voice classification of Jose Carreras" , "exact words" , "character" , "General meaning of an utterance" .)