Cut last of romantic holiday
I believe the answer is:
cleave
'cut' is the definition.
(thesaurus)
'last of romantic holiday' is the wordplay.
'last of' indicates one should take the final letters.
'holiday' becomes 'leave' (I've seen this before).
The final letter of 'romantic' is 'c'.
'c'+'leave'='CLEAVE'
(Other definitions for cleave that I've seen before include "Chop or stick to" , "remain attached" , "Join or split" , "Crack" , "Split or cling to" .)