Hearing about endless couple in lingerie (9)
I believe the answer is:
nightwear
'couple in lingerie' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'hearing about endless' is the wordplay.
I cannot quite see how this works, but
'hearing' could be 'ear' (ear is a kind of hearing) and 'ear' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for nightwear that I've seen before include "negligee, perhaps" , "Clobber after hours" , "Certain garments" , "Pyjamas, for example" , "What's on after the watershed" .)