Piece of turf, of course (5)
I believe the answer is:
divot
'piece of turf' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for divot that I've seen before include "Clump taken by a golf swing" , "Turf lifted by golf club" , "Golfer's dislodged turf" , "Clump of turf for a golfer to replace" , "Displaced grass" .)