Give up using catapult -- i.e. playing around (10)
I believe the answer is:
capitulate
'give up' is the definition.
(capitulating is a kind of giving up)
'catapult i e playing around' is the wordplay.
'playing around' indicates an anagram (I've seen this in other clues).
'catapult'+'i'+'e'='catapultie'
'catapultie' with letters rearranged gives 'CAPITULATE'.
'using' acts as a link.
(Other definitions for capitulate that I've seen before include "Surrender" , "Give in" , "Yield" .)