Dad holding bird sign marvels (9)
I believe the answer is:
phenomena
'marvels' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for phenomena that I've seen before include "Remarkable events or things, wonders (9)" , "sensations" , "He-man open to remarkable things or wonders" , "Happenings" , "Wonderful things" .)