Bird seen in Eskdalemuir (3)
I believe the answer is:
emu
'bird' is the definition.
(emu is a type of bird)
'in eskdalemuir' is the wordplay.
'in' indicates the answer is hidden within the clue.
'EMU' can be found hidden inside 'eskdalemuir'.
'seen' acts as a link.
(Other definitions for emu that I've seen before include "Aussie bird" , "Physics unit" , "Big bird" , "Hull's character" , "European project" .)