He hawks round a bargain for motorists (9)
I believe the answer is:
cheapjack
'he hawks round a' is the definition.
The definition suggests a singular noun but the answer is not.
'bargain for motorists' is the wordplay.
'bargain' becomes 'cheap' (I've seen this before).
'for motorists' becomes 'jack' (I can't explain this - if you can you should believe this answer much more).
'cheap'+'jack'='CHEAPJACK'
Can you help me to learn more?
(Other definitions for cheapjack that I've seen before include "Poor" , "inferior quality" .)