Glean about cherub (5)
I believe the answer is:
angel
'cherub' is the definition.
(thesaurus)
'glean about' is the wordplay.
'about' indicates anagramming the letters.
'glean' anagrammed gives 'ANGEL'.
(Other definitions for angel that I've seen before include "Guardian spirit; theatre investor" , "Holy being" , "Obliging person" , "Theatrical backer" , "Top D [DECORATION]" .)