Film the French on strike, a cover for Christmas activities (9)
I believe the answer is:
mistletoe
'christmas activities' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'film the french on strike a cover' is the wordplay.
'film' becomes 'M' (i9ti Fritz Lang film).
'the french on strike' becomes 'istle' (I can't explain this - if you can you should give a lot more credence to this answer).
'a cover' becomes 'toe' (toe is a kind of cover).
'm'+'istle'+'toe'='MISTLETOE'
'for' is the link.
Can you help me to learn more?
(Other definitions for mistletoe that I've seen before include "tempting a smack?" , "Something to stand under when kissing?" , "Yuletide hanging?" , "Viscum album, much sought-after around Christmas" , "Plant used as Christmas decoration" .)