Grand spread for farmhouse (6)
I believe the answer is:
grange
'farmhouse' is the definition.
(I've seen this before)
'grand spread' is the wordplay.
'grand' becomes 'g' ('G' can be a synonym of 'grand').
'spread' becomes 'range' (I've seen this in other clues).
'g'+'range'='GRANGE'
'for' acts as a link.
(Other definitions for grange that I've seen before include "farming complex" , "Country house with attached farm buildings" , "Farmhouse" , "US lodge" , "Country-house" .)