Works of fiction one found in shops (7)
I believe the answer is:
stories
'works of fiction' is the definition.
'stories' can be an answer for 'fiction'. I'm not certain of the 'works of' bit.
'one found in shops' is the wordplay.
'one' becomes 'i' (Roman numeral).
'found in' indicates putting letters inside.
'shops' becomes 'stores' ('store' can be a synonym of 'shop').
'i' put within 'stores' is 'STORIES'.
Can you help me to learn more?
(Other definitions for stories that I've seen before include "Accounts" , "For example, scoops" , "See 12" , "Lies" , "House sections" .)