Old couple of females getting away (3)
I believe the answer is:
off
'away' is the definition.
(synonyms)
'old couple of females getting' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'couple of females' becomes 'ff' (two abbreviations for female).
'getting' says to put letters next to each other.
'o'+'ff'='OFF'
(Other definitions for off that I've seen before include "Gone away or gone stale" , "away from the kerb" , "below par" , "Rotten" , "High; cancelled" .)