Effort to get section of Commons supporting Labour platform (9)
I believe the answer is:
workbench
'effort to get section of commons' is the definition.
I can't judge whether this definition defines the answer.
'supporting labour platform' is the wordplay.
'supporting' is a charade indicator (letters next to each other) (in a down clue, some letters go under others).
'labour' becomes 'work' (I've seen this before).
'platform' becomes 'bench' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'work' put next to 'bench' is 'WORKBENCH'.
Can you help me to learn more?
(Other definitions for workbench that I've seen before include "Heavy table" , "Requirement for craftsmen" , "Board of Trade" .)