Dynasty from Farmington (4)
I believe the answer is:
ming
'dynasty' is the definition.
(I've seen this before)
'from farmington' is the wordplay.
'from' says the answer is hidden in the clue.
'MING' is hidden in the letters of 'farmington'.
(Other definitions for ming that I've seen before include "Chinese dynasty 14th-17th centuries, or porcelain" , "Chinese dynasty - Flash Gordon's foe" , "An imperial Chinese dynasty" , "Porcelain associated with Chinese dynasty" , "Chinese dynasty from 1300s to 1600s" .)