Glassmaker spat some (7)
I believe the answer is:
tiffany
'glassmaker' is the definition.
Both the answer and definition are singular nouns.
Perhaps you can see a link between them that I don't see?
'spat some' is the wordplay.
'spat' becomes 'tiff' (synonyms).
'some' becomes 'any' (similar in meaning).
'tiff'+'any'='TIFFANY'
Can you help me to learn more?
(Other definitions for tiffany that I've seen before include "US glass designer" , "Transparent" , "like a sort of glass" , "gauzy fabric" , "Girl's name - New York jeweller" .)