A double blow for the French? (6)
I believe the answer is:
couple
'a double' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'blow for the french?' is the wordplay.
'blow' becomes 'coup' (I can't justify this - if you can you should believe this answer much more).
'for' means one lot of letters go next to another.
'the french?' becomes 'le' ('the' in French).
'coup'+'le'='COUPLE'
Can you help me to learn more?
(Other definitions for couple that I've seen before include "Pair, duo" , "Twosome" , "Married pair; two forces causing rotation" , "Pair - put together" , "The pair to join together" .)