Echo included in two songs making one (9)
I believe the answer is:
roundelay
'one' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'echo included in two songs' is the wordplay.
'two songs' can mean two substitutions for 'song'.
'echo' becomes 'e' (phonetic alphabet: alpha, bravo, charlie etc.).
'included in' means one lot of letters goes inside another.
'song' becomes 'round' (round is a kind of song).
'song' becomes 'lay' (poetic term for a song).
'round'+'lay'='roundlay'
'e' inserted inside 'roundlay' is 'ROUNDELAY'.
'making' is the link.
Can you help me to learn more?
(Other definitions for roundelay that I've seen before include "Circle dance; simple song" , "Slow, medieval dance, in a circle" , "Short, simple song" , "Slow, circling medieval dance" , "Slow dance - song with refrain" .)