So rest is disturbed in certain shops (6)
I believe the answer is:
stores
'certain shops' is the definition.
'stores' can be an answer for 'shops' ('store' can be a synonym of 'shop'). I'm not sure about the 'certain' bit.
'so rest is disturbed' is the wordplay.
'is disturbed' is an anagram indicator (the order of letters is disturbed).
'so'+'rest'='sorest'
'sorest' with letters rearranged gives 'STORES'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for stores that I've seen before include "Keeps" , "Retail outlets" , "Where maintenance items are kept" , "Lays in, hives away" , "Establishments for retail sales" .)