People poetic at heart compose for organ, perhaps? (7)
I believe the answer is:
typeset
'compose for organ perhaps?' is the definition.
I can't judge whether this definition defines the answer.
'people poetic at heart' is the wordplay.
'people' becomes 'types' (type is a kind of person).
'at heart' means to look at the middle letters.
The middle letters of 'poetic' are 'et'.
'types'+'et'='TYPESET'
Can you help me to learn more?
(Other definitions for typeset that I've seen before include "Like" , "Ready to be printed" , "characters lined up ready for a run-off?" , "Arrange (text) for printing" , "(Of fonts) ready to print" .)