Uncle's redheaded birds (5)
I believe the answer is:
remus
'uncle's' is the definition.
(I've seen this before)
'redheaded birds' is the wordplay.
'redheaded' becomes 'r' (this could be a standard abbreviation of which I'm unaware).
'birds' becomes 'emus' (emu is a kind of bird).
'r'+'emus'='REMUS'
Can you help me to learn more?
(Other definitions for remus that I've seen before include "Legendary founder of Rome" , "J. C. Harris's storyteller Uncle" , "partner in City foundation" , "One responsible for capital" , "Suckled by a she-wolf, I was" .)