Tolerate student's inclusion, variable and unfocused (6)
I believe the answer is:
bleary
'unfocused' is the definition.
(I've seen this in another clue)
'tolerate student's inclusion variable' is the wordplay.
I cannot quite see how this works, but
'variable' could be 'y' (algebra) and 'y' is found within the answer.
'student' could be 'l' (as in L-plates for learner drivers) and 'l' is present in the answer.
'tolerate' could be 'bear' (synonyms) and 'bear' is found within the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'and' acts as a link.
Can you help me to learn more?
(Other definitions for bleary that I've seen before include "Smudged, indistinct" , "with tired eyes" , "Misty" , "Like the unfocused vision" , "lacking focused vision" .)