Split watch with one working a few hours a week (4-5)
I believe the answer is:
part-timer
'one working a few hours a week' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'split watch' is the wordplay.
'split' becomes 'part' (synonyms).
'watch' becomes 'timer' (a watch might be used to time something).
'part'+'timer'='PART-TIMER'
'with' is the link.
Can you help me to learn more?
(Other definitions for part-timer that I've seen before include "worker on reduced hours" , "One working reduced hours" , "One not working the whole week" , "One working less than a full week" , "Casual worker" .)