Joined me for the tango (3)
I believe the answer is:
met
'joined' is the definition.
(meeting is a kind of joining)
'me for the tango' is the wordplay.
'for' says to put letters next to each other.
'the tango' becomes 't' (phonetic alphabet: alpha, bravo, charlie etc.).
'me'+'t'='MET'
(Other definitions for met that I've seen before include "Opera company" , "London police (abbr) - New York Museum of Art (abbr)" , "Encountered, came across" , "gathered together" , "Came across - police in London" .)