Officer twice has a drink (5)
I believe the answer is:
cocoa
'drink' is the definition.
(I know that cocoa is a drink)
'officer twice has a' is the wordplay.
'officer' becomes 'co' (Commanding Officer abbreviation).
'twice' shows that letters should be duplicated.
'has' says to put letters next to each other.
'co' doubled is 'coco'.
'coco'+'a'='COCOA'
(Other definitions for cocoa that I've seen before include "Bean used in making chocolate" , "Chocolate ingredient" , "Drinking chocolate" , "Hot beverage" , "Lightish brown colour of a drink" .)