Pop has the makings of a poet (6)
I believe the answer is:
sappho
'poet' is the definition.
(ancient Greek poet)
'pop has the makings' is the wordplay.
'pop has' anagrams to 'SAPPHO'.
Though, I'm unsure how this is indicated.
'of a' is the link.
Can you help me to learn more?
(Other definitions for sappho that I've seen before include "Ancient Greek poet of Lesbos" , "Greek lyric poetess" , "Greek poetess; has pop (anag.)" , "Sixth century BC Greek poetess" , "Greek female poet" .)