Break from holding a position (3)
I believe the answer is:
gap
'break' is the definition.
(a gap is a break in something)
'from holding a position' is the wordplay.
'from' indicates the answer is hidden within the clue.
'GAP' is hidden in the letters of 'holding a position'.
(Other definitions for gap that I've seen before include "Disparity" , "A break or opening as in a hedge" , "Interval, break" , "Open space between two things, mind it" , "Break, in a fence say" .)