Court guarded by two officers (3)
I believe the answer is:
woo
'court' is the definition.
('woo' can be a synonym of 'court')
'guarded by two officers' is the wordplay.
'guarded by' indicates the answer is hidden within the clue.
'WOO' can be found hidden inside 'two officers'.
(Other definitions for woo that I've seen before include "Court; importune" , "Pay court to" , "Do courting" , "Court, romance" , "Court, seek to marry" .)