Bloke is repairing monument (7)
I believe the answer is:
obelisk
'monument' is the definition.
(type of monument or landmark)
'bloke is repairing' is the wordplay.
'repairing' indicates anagramming the letters (the order is repaired).
'bloke'+'is'='blokeis'
'blokeis' with letters rearranged gives 'OBELISK'.
(Other definitions for obelisk that I've seen before include "Tapering pillar erected as monument" , "Tapering, rectangular stone column" , "Stone "needle"" , "Tall stone monument" , "Pyramidal monument" .)