Such eyes may find keys regularly in cupboard (5-3)
I believe the answer is:
close-set
'such eyes' is the definition.
(close-set eyes are eyes which are close together)
'keys regularly in cupboard' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'in' means one lot of letters goes inside another.
'cupboard' becomes 'closet' (synonyms).
The alternate letters of 'keys' are 'es'.
'es' going into 'closet' is 'CLOSE-SET'.
'may find' is the link.
(Other definitions for close-set that I've seen before include "With little space between them, eyes perhaps" , "(Eg of eyes) very near to each other" , "Tight together" .)