Taking shelter inside agent's whacked (6)
I believe the answer is:
sleepy
'whacked' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I don't see?
'taking shelter inside agent's' is the wordplay.
'taking shelter' becomes 'lee' (as in lee side, the side sheltered from wind. I am not sure about the 'taking' bit.).
'inside' indicates putting letters inside.
'agent' becomes 'spy' (spy is a kind of agent).
'lee' inserted within 'spy' is 'SLEEPY'.
Can you help me to learn more?
(Other definitions for sleepy that I've seen before include "Ready for bed" , "Somnolent" , "Dwarf" , "Drowsy - without excitement" , "Feeling like having a snooze" .)