Show disapproval about tango and current music everyone plays (5)
I believe the answer is:
tutti
'music everyone plays' is the definition.
(musical direction meaning all instruments together)
'show disapproval about tango and current' is the wordplay.
'show disapproval' becomes 'tut' (tutting expresses disapproval).
'about' says the letters should be written backwards.
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'and' says to put letters next to each other.
'current' becomes 'I' (symbol for electric current).
't' put after 'i' is 'it'.
'it' back-to-front is 'ti'.
'tut'+'ti'='TUTTI'
(Other definitions for tutti that I've seen before include "Everyone join in (mus.)" , "(Of an orchestra) all to play together" , "Passage using all instruments" , "Piece of music for the whole orchestra" , "(Musically) performed by all instruments" .)