Series about small person — one finishing up in the theatre? (8)
I believe the answer is:
stitcher
'one finishing up in the theatre?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'series about small person' is the wordplay.
'series' becomes 'ser' (abbreviation for series).
'about' indicates putting letters inside.
'small person' becomes 'titch' (titch can informally mean a short person).
'ser' placed around 'titch' is 'STITCHER'.
Can you help me to learn more?
(Other definitions for stitcher that I've seen before include "One using needle and thread" , "sewer" , "nurse in Casualty, perhaps" .)