Engine check for RAF say (7)
I believe the answer is:
service
'raf say' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'engine check' is the wordplay.
I cannot really understand how this works, but
'engine' could be 'ice' (I've seen this before) and 'ice' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for service that I've seen before include "tree" , "Tennis opening shot" , "Waiting" , "Act of assistance; ceremony" , "mass, say" .)