Weapons found in farmstead (4)
I believe the answer is:
arms
'weapons' is the definition.
('arm' can be a synonym of 'weapon')
'in farmstead' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ARMS' can be found hidden inside 'farmstead'.
'found' is the link.
(Other definitions for arms that I've seen before include "Protesting violently, up in these" , "Arsenal's items?" , ". . . . and the Man (G B Shaw) (4)" , "Heraldic devices" , "Weapons and limbs" .)