Fixture that might prove gripping for Windsor? (3,4)
I believe the answer is:
tie clip
'fixture that might prove gripping for windsor?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'fixture that might' is the wordplay.
'fixture' becomes 'tie' (I've seen this before).
'that might' becomes 'clip' (I can't justify this - if you can you should believe this answer much more).
'tie'+'clip'='TIE-CLIP'
Can you help me to learn more?
(Other definitions for tie clip that I've seen before include "Man's ornamental clasp" , "Neckwear securer" , "clothing accessory" .)