Guarded area in soccer (4)
I believe the answer is:
shin
'guarded area in soccer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for shin that I've seen before include "kick" , "Front part of the leg between knee and ankle" , "Leg-bone" , "Part of the human leg" , "letter from Israel" .)