What may accompany Scotch egg in periphery of Shetland area (4)
I believe the answer is:
soda
'what may accompany scotch egg in periphery' is the definition.
I can't tell whether this definition defines the answer.
'shetland area' is the wordplay.
'shetland' becomes 'sod' (I can't explain this - if you can you should give a lot more credence to this answer).
'area' becomes 'a' (maths abbreviation).
'sod'+'a'='SODA'
'of' is the link.
Can you help me to learn more?
(Other definitions for soda that I've seen before include "Type of bread, water or fountain" , "Accompaniment to whisky" , "Mixer drink" , "Fizzy drink - chemical compound" , "Sodium carbonate" .)