Hood's mate in a tiny WC (6,4)
I believe the answer is:
little john
'hood's mate' is the definition.
The definition suggests a singular noun which matches the answer.
'tiny wc' is the wordplay.
'tiny' becomes 'little' (similar in meaning).
'wc' becomes 'john' (I can't explain this - if you can you should give a lot more credence to this answer).
'little'+'john'='LITTLE JOHN'
'in a' is the link.
Can you help me to learn more?
(Other definitions for little john that I've seen before include "Friend of Robin Hood" , "big man in 7 [FOREST]" , "Companion of Robin Hood" , "Outlaw" , "One of Robin Hood's followers" .)