Red Cross patron? (5,6)
I believe the answer is:
queer street
'red' is the definition.
(I have seen 'The Red' mean 'queer street' so perhaps 'red' could also mean 'queer street')
'cross patron?' is the wordplay.
'cross' becomes 'queer' (synonyms).
'patron?' becomes 'street' (I can't explain this - if you can you should give a lot more credence to this answer).
'queer'+'street'='QUEER STREET'
Can you help me to learn more?
(Other definitions for queer street that I've seen before include "The Red" , "Supposed residences of people in debt" , "in financial difficulties - with 7d" , "Bankrupts' road" .)