Old couple in Split, dancing perhaps (8)

'dancing perhaps' is the definition.
(dancing requires fancy footwork)

'old couple in split' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'couple' becomes 'two' (two people or things).
'in' means one lot of letters goes inside another.
'split' becomes 'fork' (I've seen this before).
'o'+'two'='otwo'
'otwo' placed within 'fork' is 'FOOTWORK'.