Original luscious number one from Motown? (4,5)
I believe the answer is:
soul music
'one from motown?' is the definition.
The definition suggests an adjective which matches the answer.
'original luscious number' is the wordplay.
I cannot really see how this works, but
'number' could be 'm' (M is an example) and 'm' is located in the answer.
an anagram of 'luscious' is 'soulusic' which is located in the remaining letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for soul music that I've seen before include "Late 1950s' genre combining R & B and gospel" , "American tunes" , "Blend of blues, jazz etc." , "work of Franklin" , "Songs from Aretha Franklin, for example" .)