Tuneful rock band departs, one embraced by host (7)
I believe the answer is:
melodic
'tuneful' is the definition.
(I've seen this before)
'rock band departs one embraced by host' is the wordplay.
'rock band' becomes 'elo' (I can't justify this - if you can you should believe this answer much more).
'departs' becomes 'd' (common abbreviation e.g. train timetables).
'one' becomes 'i' (roman numeral).
'embraced by' means one lot of letters goes inside another.
'host' becomes 'mc' (I've seen this in other clues).
'elo'+'d'+'i'='elodi'
'elodi' inserted inside 'mc' is 'MELODIC'.
Can you help me to learn more?
(Other definitions for melodic that I've seen before include "Harmonious" , "Pleasant-sounding" , "Pleasant to listen to" , "Pleasant-sound" , "Of music, tuneful and sweet" .)