Bill free of bitterness? (5)
I believe the answer is:
acrid
'bitterness?' is the definition.
The answer and definition are not the same part of speech.
'bill free' is the wordplay.
'bill' becomes 'ac' (short for account).
'free' becomes 'rid' (to be free of something is to be rid of it).
'ac'+'rid'='ACRID'
'of' is the link.
Can you help me to learn more?
(Other definitions for acrid that I've seen before include "Bitter in smell, like smoke" , "Pungent; caustic" , "Bitter or corrosive" , "Bitter - pungent" , "Unpleasantly pungent" .)