Pleasing foxtrot tune (4)
I believe the answer is:
fair
'pleasing' is the definition.
(thesaurus)
'foxtrot tune' is the wordplay.
'foxtrot' becomes 'f' (phonetic alphabet: alpha, bravo, charlie etc.).
'tune' becomes 'air' (air can mean a piece of music).
'f'+'air'='FAIR'
(Other definitions for fair that I've seen before include "Just right" , "Favourable" , "promotional exhibition" , "Average" , "clear" .)