Common pal never dances tango (9)
I believe the answer is:
prevalent
'common' is the definition.
(thesaurus)
'pal never dances tango' is the wordplay.
'dances' indicates anagramming the letters.
'tango' becomes 't' (phonetic alphabet: alpha, bravo, charlie etc.).
'pal'+'never'='palnever'
'palnever' anagrammed gives 'prevalen'.
'prevalen'+'t'='PREVALENT'
(Other definitions for prevalent that I've seen before include "powerful" , "Commonplace" , "Widespread - current" , "Widely accepted" , "Ruling" .)