Sweet drinks included every so often in shop deals (5)
I believe the answer is:
sodas
'sweet drinks' is the definition.
(I've seen this in another clue)
'included every so often in shop deals' is the wordplay.
I cannot really understand how this works, but
'so' could be 'as' (e.g. phrases like 'not as tall' and 'not so tall') and 'as' is found within the answer.
The remaining letters 'sod' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for sodas that I've seen before include "Soft drinks" , "Fizzy drinks" .)