Like music in restaurant, on always (5)
I believe the answer is:
tonal
'like music' is the definition.
(I've seen this in another clue)
'in restaurant on always' is the wordplay.
'in' indicates the answer is hidden within the clue.
'TONAL' can be found hidden inside 'restaurant on always'.
(Other definitions for tonal that I've seen before include "With conventional key and harmony" , "Using conventional keys/harmonies" , "of sound quality" , "Written in conventional keys and harmony" , "style of music" .)