What's most important, having family doctor at home (7)
I believe the answer is:
kingpin
'what's most important' is the definition.
I can't tell whether this defines the answer.
'family doctor at home' is the wordplay.
'family' becomes 'kin' (synonyms).
'doctor' becomes 'GP' (general practitioner).
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'kin'+'gp'+'in'='KINGPIN'
'having' acts as a link.
Can you help me to learn more?
(Other definitions for kingpin that I've seen before include "Crucial person in organisation" , "Essential person or thing" , "Group leader" , "Pink gin for indispensable person" , "Most important member of organisation" .)