Literature no matter what? It could be repetitive (6)
I believe the answer is:
litany
'it could be repetitive' is the definition.
The definition suggests a singular noun which matches the answer.
'literature no matter what?' is the wordplay.
'literature' becomes 'lit' (abbreviation).
'no matter what?' becomes 'any' (I can't justify this - if you can you should believe this answer much more).
'lit'+'any'='LITANY'
Can you help me to learn more?
(Other definitions for litany that I've seen before include "Catalogue" , "petitions" , "Repetitive series" , "Prayer of invocation to the saints" , "Long and tedious list" .)