Old money for a unionist? (7)
I believe the answer is:
guilder
'old money' is the definition.
The definition suggests a singular noun which matches the answer.
'a unionist?' is the wordplay.
I cannot quite see how this works, but
'unionist?' could be 'u' (abbreviation as in Democratic Unionist Party) and 'u' is located in the answer.
The remaining letters 'gilder' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'for' is the link.
Can you help me to learn more?
(Other definitions for guilder that I've seen before include "old European money" , "Former Dutch currency" , "Former Dutch coin" , "Unit of money in Netherlands" , "Former European currency" .)