Put away TV when I date Marie (at last!) (3,5)
I believe the answer is:
set aside
'put away' is the definition.
(thesaurus)
'tv when i date marie at last' is the wordplay.
'tv' becomes 'set' (I've seen this in other clues).
'when' becomes 'as'.
'date' becomes 'd' (common abbreviation eg in DOB, date of birth).
'at last' says to take the final letters.
The last letter of 'marie' is 'e'.
'set'+'as'+'i'+'d'+'e'='SET-ASIDE'
(Other definitions for set aside that I've seen before include "The policy of taking land out of production to reduce crop surplus" , "Reserve or put away" , "Discount" , "Save or discard" , "agricultural policy" .)