With an imitation cover, or awning (6)
I believe the answer is:
canopy
'awning' is the definition.
(I've seen this before)
'with an imitation' is the wordplay.
'with' is an insertion indicator.
'imitation' becomes 'copy' (I've seen this in another clue).
'an' placed within 'copy' is 'CANOPY'.
'cover or' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for canopy that I've seen before include "Ornamental awning" , "Hangong cover as over a bed" , "Ornamental covering" , "Covering over four-poster, etc" , "Cloth covering" .)