Distinct in cloudless section (5-3)
I believe the answer is:
clear-cut
'distinct' is the definition.
(I've seen this before)
'cloudless section' is the wordplay.
'cloudless' becomes 'clear'.
'section' becomes 'cut' (cut is a kind of section).
'clear'+'cut'='CLEAR-CUT'
'in' is the link.
(Other definitions for clear-cut that I've seen before include "Unambiguous" , "Free from obscurity" , "Well defined" , "Well-defined" , "Definite - 2 down" .)