Southwark infirmary for men only? (4,8)
I believe the answer is:
guys hospital
'only?' is the definition.
Both the answer and definition are adjectives.
Perhaps you can see a link between them that I can't see?
'southwark infirmary for men' is the wordplay.
'southwark infirmary' becomes 'hospital' (I can't explain this - if you can you should give a lot more credence to this answer).
'for' says to put letters next to each other (I've seen this in other clues).
'men' becomes 'guys'.
'hospital' put after 'guys' is 'GUYS HOSPITAL'.
Can you help me to learn more?
(Another definition for guys hospital that I've seen is " London medical teaching establishment".)