Sea Pigeon revived? It's spooky! (9)
I believe the answer is:
espionage
'it's spooky' is the definition.
I can't judge whether this defines the answer.
'sea pigeon revived?' is the wordplay.
'revived?' indicates an anagram (I've seen this in other clues).
'sea'+'pigeon'='seapigeon'
'seapigeon' is an anagram of 'ESPIONAGE'.
Can you help me to learn more?
(Other definitions for espionage that I've seen before include "intelligence" , "undercover work" , "seeking information" , "Practice of spying" , "hush-hush work" .)