Minute hole in one weapon (4)
I believe the answer is:
mace
'weapon' is the definition.
'minute hole in one' is the wordplay.
'minute' becomes 'm' (abbreviation).
'hole in one' becomes 'ace' (I've seen this before).
'm'+'ace'='MACE'
(Other definitions for mace that I've seen before include "Staff of office and a spice" , "Tear gas - spice" , "One of 9 [CLUBS]" , "Came to get nutmeg spice" , "Came to find ceremonial staff" .)