Sleep outside University of Louisiana for grade (6)
I believe the answer is:
result
'grade' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'sleep outside university of louisiana' is the wordplay.
'sleep' becomes 'rest' (synonyms).
'outside' means one lot of letters goes inside another.
'university of louisiana' becomes 'ul' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'rest' enclosing 'ul' is 'RESULT'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for result that I've seen before include "End - issue" , "Effect - outcome" , "'Outcome, upshot (6)'" , "Effect of lustre" , "Ulster (anag) - outcome" .)