One appearing in case before or after five? It's not important (7)
I believe the answer is:
trivial
'not important' is the definition.
'one appearing in case before or after five?' is the wordplay.
I cannot really understand how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
'five?' could be 'v' (Roman numeral) and 'v' is found within the answer.
'case' could be 'trial' (court case) and 'trial' is found within the leftover letters.
No letters remain.
This explanation may well be incorrect...
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for trivial that I've seen before include "Trifling" , "Rinky-dink" , "Banal" , "Piddling" , "Footling" .)