Put one's feet up (4)
I believe the answer is:
rest
'put one's feet up' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rest that I've seen before include "Relax, take a break" , "Take a breather - (the) others" , "Surplus" , "Settle" , "Lie down" .)