Notice Liberal making off-the-cuff remark (2-3)
I believe the answer is:
ad-lib
'off-the-cuff remark' is the definition.
(I've seen this before)
'notice liberal' is the wordplay.
'notice' becomes 'ad' (short for advert).
'liberal' becomes 'lib'.
'ad'+'lib'='AD-LIB'
'making' is the link.
(Other definitions for ad-lib that I've seen before include "without restraint" , "Speak off the cuff" , "Off-the-cuff remark" , "spontaneous comment" , "Extemporise" .)