By the sound of it, swallowed a delicious drink (6)
I believe the answer is:
nectar
'delicious drink' is the definition.
(I've seen this in another clue)
'by the sound of it swallowed a' is the wordplay.
I cannot really see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is present in the answer.
'a' is within the answer.
The remaining letters 'ncr' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for nectar that I've seen before include "sweet stuff" , "Beverage of the gods" , "tasty beverage" , "Sugary secretion" , "Heavenly brew" .)