Put back prop holding base (5)
I believe the answer is:
reset
'put back' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for reset that I've seen before include "Replace, resettle or put back again" , "Restore to original state" , "Restore to required state" , "Trees (anag)" , "fix position again" .)