Friendly with a woolly-headed member (4)
I believe the answer is:
warm
'friendly' is the definition.
(synonym)
'woolly-headed member' is the wordplay.
'woolly-headed' becomes 'w' (this could be a standard abbreviation which I don't know about).
'member' becomes 'arm' (member can mean a limb).
'w'+'arm'='WARM'
'with a' acts as a link.
Can you help me to learn more?
(Other definitions for warm that I've seen before include "Friendly" , "Near to finding hidden object" , "excited" , "Affectionate; heat" , "Approaching target" .)