Earl introduces artist to one inspiring poet? (5)
I believe the answer is:
erato
'one inspiring poet?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'earl introduces artist to' is the wordplay.
'earl' becomes 'e'.
'introduces' is a charade indicator (letters next to each other).
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'e'+'ra'+'to'='ERATO'
Can you help me to learn more?
(Other definitions for erato that I've seen before include "verses she inspired" , "One of the Muses" , "goddess" , "Poet's muse" , "Poetic Muse ; eighteen (anag.)" .)