Hear lots about nobleman (4)
I believe the answer is:
earl
'nobleman' is the definition.
(member of the nobility)
'hear lots about' is the wordplay.
'about' says the answer is hidden in the clue (the clue goes around or about the answer).
'EARL' is hidden within 'hear lots'.
(Other definitions for earl that I've seen before include "... Grey, fragrant Oriental tea" , "Real (anag) - nobleman" , "A lord like Lear" , "British noble" , "One who's been elevated" .)