Pub supporter never has screwdriver say (8)
I believe the answer is:
barstool
'pub supporter' is the definition.
The definition suggests a singular noun which matches the answer.
'never has screwdriver say' is the wordplay.
'never' becomes 'bars' (I can't justify this - if you can you should give a lot more credence to this answer).
'has' says to put letters next to each other.
'screwdriver say' becomes 'tool' (screwdriver is a kind of tool).
'bars'+'tool'='BARSTOOL'
Can you help me to learn more?
(Other definitions for barstool that I've seen before include "Drinker's seat" , "Pub seat" , "support for a drinker?" .)