Contradictory facial expression for one providing support (9)
I believe the answer is:
crossbeam
'contradictory facial expression' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'one providing support' is the wordplay.
'one providing' becomes 'cross' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'support' becomes 'beam' (beam is a kind of support).
'cross'+'beam'='CROSSBEAM'
'for' acts as a link.
Can you help me to learn more?
(Another definition for crossbeam that I've seen is " Support".)