Say Snoopy battles Red Baron in these? (9)
I believe the answer is:
dogfights
'red baron in these?' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'say snoopy battles' is the wordplay.
I cannot really see how this works, but
'battles' could be 'fights' (fight is a kind of battle) and 'fights' is found within the answer.
The remaining letters 'dog' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
(Another definition for dogfights that I've seen is " contests at a higher level".)