Quickly providing two portions of meat (4-4)
I believe the answer is:
chop-chop
'quickly' is the definition.
('chop-chop' can be a synonym of 'quickly')
'two portions of meat' is the wordplay.
'two portions of' shows that letters should be duplicated.
'meat' becomes 'chop' (chop is a kind of meat).
'chop' duplicated is 'CHOP-CHOP'.
'providing' acts as a link.
(Other definitions for chop-chop that I've seen before include "Hurry up!" , "Quickly!" , "Get a move on!" .)