Field doctor tears up (7)
I believe the answer is:
pasture
'field' is the definition.
(a pasture is a field for sheep)
'doctor tears up' is the wordplay.
'doctor' indicates an anagram.
'tears'+'up'='tearsup'
'tearsup' is an anagram of 'PASTURE'.
(Other definitions for pasture that I've seen before include "Meadow" , "Grass for grazing" , "Stock holder, perhaps" , "Land for grazing cattle" , "Meadowland" .)