A new set taking on a girl (6)
I believe the answer is:
angela
'girl' is the definition.
'a new set taking on a' is the wordplay.
'a new' becomes 'an' (I've seen this in other clues).
'set' becomes 'gel' (I've seen this before**).
'taking on' says to put letters next to each other.
'an'+'gel'+'a'='ANGELA'
(Other definitions for angela that I've seen before include "woman" , "- Gheorghiu, Romanian soprano" , "girl" , ". . . Lansbury (actress)" , "- Carter, English writer" .)