Hector is shivering in the grip of cold turkey, drained, irritable (9)
I believe the answer is:
crotchety
'irritable' is the definition.
(I've seen this before)
'hector is shivering in the grip of cold turkey drained' is the wordplay.
'is shivering' is an anagram indicator.
'in the grip of' is an insertion indicator.
'cold' becomes 'c' (eg on taps).
'drained' says to hollow out the word (remove centre letters).
'turkey' with its middle removed is 'ty'.
'hector' with letters rearranged gives 'rotche'.
'c'+'ty'='cty'
'rotche' put inside 'cty' is 'CROTCHETY'.
(Other definitions for crotchety that I've seen before include "Bad-humoured or peevish" , "Difficult" , "Irritable" , "Ill-tempered" , "irascible" .)