Nevertheless, chaps in a tango will give support (8)
I believe the answer is:
abutment
'support' is the definition.
(abutment is a kind of support)
'nevertheless chaps in a tango' is the wordplay.
'nevertheless' becomes 'but' (I've seen this in other clues).
'chaps' becomes 'men' (chap means a man).
'in' is an insertion indicator.
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'but'+'men'='butmen'
'a'+'t'='at'
'butmen' going into 'at' is 'ABUTMENT'.
'will give' acts as a link.
(Other definitions for abutment that I've seen before include "Meeting" , "structural support" , "Arch-supporting structure" , "Structure supporting an arch" .)