Unpleasant, and very cold, outside King’s Head (4)
I believe the answer is:
icky
'unpleasant' is the definition.
(I've seen this before)
'very cold outside king's head' is the wordplay.
'very cold' becomes 'icy' (I've seen this before).
'outside' is an insertion indicator.
'head' says to take the initial letters.
The first letter of 'kings' is 'k'.
'icy' placed around 'k' is 'ICKY'.
'and' is the link.
(Other definitions for icky that I've seen before include "Repulsively sentimental" , "Distasteful - over-sentimental" , "Very bad" , "Cloying -- repulsive" , "Revolting" .)