Small farm's peaceful (5)
I believe the answer is:
still
'peaceful' is the definition.
(thesaurus)
'small farm's' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'farm' becomes 'till' (to till is to work on land).
's'+'till'='STILL'
(Other definitions for still that I've seen before include "source of spirits" , "gentle" , "Stationary" , "Retort; nevertheless" , "Yet; not moving" .)