Don't take away contents of meat can (3,2)
I believe the answer is:
eat in
'don't take away' is the definition.
(eating in a restaurant, not having a takeaway)
'contents of meat can' is the wordplay.
'contents of' indicates the central letters (I've seen 'content of' mean this).
'can' becomes 'tin' ('tin' can be a synonym of 'can').
The middle of 'meat' is 'ea'.
'ea'+'tin'='EAT IN'
(Other definitions for eat in that I've seen before include "Have fare home" , "Avoid restaurant" , "get takeaway?" , "corrode" , "Dine at home" .)