Looked annoyed when called out (6)
I believe the answer is:
peeked
'looked' is the definition.
(peeking is a kind of looking)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for peeked that I've seen before include "Took a secret look" , "Looked surreptitiously" , "Glanced surreptitiously" , "Looked furtively" .)