In the morning, milk please! (5)
I believe the answer is:
amuse
'please' is the definition.
(I've seen this in another clue)
'in the morning milk' is the wordplay.
'in the morning' becomes 'am' (AM on a clock).
'milk' becomes 'use' (both can mean to exploit).
'am'+'use'='AMUSE'
(Other definitions for amuse that I've seen before include "Keep occupied" , "Cause to laugh or smile" , "interest" , "Recreate" , "Cause mirth - distract" .)