Success taking cat (queen, say) up in this? (5,4)
I believe the answer is:
tiger moth
'up in this?' is the definition.
(tiger moth is a type of plane)
'success taking cat queen' is the wordplay.
I cannot really see how this works, but
'cat' could be 'tiger' (tiger is a kind of cat) and 'tiger' is present in the answer.
The remaining letters 'moth' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'say' is the link.
(Other definitions for tiger moth that I've seen before include "this one has brightly-coloured wings" , "Insect - aeroplane" , "Woolly bear" , "Spotted flyer" , "producer of woolly bears" .)