Eye opening (5)
'eye opening?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for slit that I've seen before include "Long straight cut" , "Long narrow opening" , "Incision" , "Narrow aperture" , "Long narrow cut" .)
'eye opening' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pupil that I've seen before include "bit of a looker" , "One in the eye or in place of learning" , "A student at school or eye part" , "Schoolboy or eye part" , "Dark centre of the eye" .)