Came across roses from Somerset (3)
I believe the answer is:
met
'came across' is the definition.
('meet' can be a synonym of 'come across')
'roses from somerset' is the wordplay.
'from' is a deletion indicator.
'somerset' with 'roses' removed is 'MET'.
(Other definitions for met that I've seen before include "Encountered or touched" , "satisfied" , "Got together" , "Opera company" , "Encountered, came across" .)