Frank, perhaps (5)
I believe the answer is:
bruno
'frank perhaps' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for bruno that I've seen before include "Sylvie and -- (Lewis Carroll)" , "Famous boxer" , "Giordano -; Sylvie and -, Carroll" , "One of the 22 [FRANKS] who fought" .)