Outer garment appreciated by poet (6)
I believe the answer is:
tabard
'outer garment' is the definition.
(tabard is a kind of outer garment)
'appreciated by poet' is the wordplay.
'appreciated' becomes 'ta' (I've seen this in other clues).
'by' says to put letters next to each other.
'poet' becomes 'bard' (bard is a kind of poet).
'ta'+'bard'='TABARD'
(Other definitions for tabard that I've seen before include "Jacket worn by a herald" , "Herald's garment" , "[A] top" , "Herald's coat or tunic" , "Historical tunic" .)