Type of drawing-room that's not being used by worker
I believe the answer is:
free hand
'type of drawing-room' is the definition.
I can't tell whether this defines the answer.
'not being used by worker' is the wordplay.
'not being' becomes 'free' (I am not sure about this - if you are sure you should believe this answer much more).
'used by' is a charade indicator (letters next to each other).
'worker' becomes 'hand' (hand is a kind of worker).
'free'+'hand'='FREE-HAND'
'that's' is the link.
Can you help me to learn more?
(Other definitions for free hand that I've seen before include "Style of drawing - carte blanche (8;4,4)" , "Right to act completely at one's own discretion" , "Authority" , "Done without mechanical aid or device" , "Power to organise as one chooses" .)