Move slowly, with a quack, into the drink! (5)
I believe the answer is:
amble
'move slowly' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'quack into the drink' is the wordplay.
'quack' becomes 'mb' (I can't explain this - if you can you should believe this answer much more).
'into' means one lot of letters goes inside another.
'the drink' becomes 'ale' (type of beer).
'mb' inserted into 'ale' is 'AMBLE'.
'with a' is the link.
Can you help me to learn more?
(Other definitions for amble that I've seen before include "Casual walk" , "Mosey (along)" , "Meander" , "Wander casually" , "Make slow progress" .)