Remove during jousting (4)
I believe the answer is:
oust
'remove' is the definition.
(I know that oust is a more specific form of the action remove)
'during jousting' is the wordplay.
'during' says the answer is hidden in the clue.
'OUST' can be found hidden inside 'jousting'.
(Other definitions for oust that I've seen before include "Overthrow" , "Extract" , "Send packing" , "Expel (from a place)" , "Get rid of" .)