Irishman called out, visibly cold in shade (4,4)
I believe the answer is:
nile blue
'shade' is the definition.
'irishman called out visibly cold' is the wordplay.
'irishman' becomes 'niall' (common Irish name).
'called out' indicates a 'sounds like' (homophone) clue.
'visibly cold' becomes 'blue'.
'niall' is a homophone of 'nile'.
'nile'+'blue'='NILE BLUE'
'in' acts as a link.
(Other definitions for nile blue that I've seen before include "Pale turquoise" , "hue" .)