Star full of power, or police officer without staff (10)
I believe the answer is:
superwoman
'star full of power' is the definition.
The definition suggests a singular noun which matches the answer.
'police officer without staff' is the wordplay.
'police officer' becomes 'super' (term for a senior police officer).
'without' becomes 'wo' (abbreviation of 'without', normally with a slash).
'staff' becomes 'man' (as in staffing or manning a particular place).
'super'+'wo'+'man'='SUPERWOMAN'
'or' is the link.
Can you help me to learn more?
(Other definitions for superwoman that I've seen before include "Female with a full-time job who also runs the home and looks after the children?" , "Extremely able female" .)