A sweeper beginning to be someone (5)
I believe the answer is:
besom
'a sweeper' is the definition.
(I've seen this before)
'beginning to be someone' is the wordplay.
I cannot really understand how this works, but
'be' is within the answer.
The remaining letters 'som' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for besom that I've seen before include "I sweep" , "Lazy woman" , "cleaner?" , "Broom made from twigs tied to a handle" , "Sweeping item" .)