Still the old-fashioned tango (3)
I believe the answer is:
yet
'still' is the definition.
(yet can mean still or so far)
'the old-fashioned tango' is the wordplay.
'the old-fashioned' becomes 'ye' (resembles a historical spelling of 'the').
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'ye'+'t'='YET'
(Other definitions for yet that I've seen before include "Up till now" , "'But, however (3)'" , "Though; still" , "in spite of that" , "To this time, nevertheless" .)