Bedcover we'd ironed poorly
I believe the answer is:
eiderdown
'bedcover' is the definition.
(thesaurus)
'we'd ironed poorly' is the wordplay.
'poorly' indicates an anagram.
'wed'+'ironed'='wedironed'
'wedironed' is an anagram of 'EIDERDOWN'.
(Other definitions for eiderdown that I've seen before include "thermal insulation" , "cover when retired" , "I wondered about this warm bed covering" , "Feather quilt" , "Soft quilt filled with duck feathers" .)