A quibbler has no charm (7)
I believe the answer is:
pendant
'charm' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'a quibbler has no' is the wordplay.
'a quibbler' becomes 'pedant' (I've seen this before).
'has' means one lot of letters goes inside another.
'no' becomes 'n' (common abbreviation).
'pedant' going around 'n' is 'PENDANT'.
Can you help me to learn more?
(Other definitions for pendant that I've seen before include "earring, say" , "item suspended" , "Hanging light" , "Ornament hanging from a piece of jewellery" , "Ornament hanging from necklace" .)