Inexperienced goalie: one must take care of course (11)
I believe the answer is:
greenkeeper
'one must take care of course' is the definition.
I can't tell whether this defines the answer.
'inexperienced goalie' is the wordplay.
'inexperienced' becomes 'green' (similar in meaning).
'goalie' becomes 'keeper' (I've seen this before).
'green'+'keeper'='GREENKEEPER'
Can you help me to learn more?
(Other definitions for greenkeeper that I've seen before include "Golf course tender" , "One maintaining a golf course" , "Golf course maintainer" , "Person having care of golf course" , "One employed to look after a golf course" .)