Maybe hiding from danger underground (6)
I believe the answer is:
gerund
'maybe hiding from danger underground' is the definition.
I can't judge whether this defines the answer.
'hiding from danger underground' is the wordplay.
'hiding' says the answer is hidden in the clue.
'GERUND' is hidden in the letters of 'from danger underground'.
Can you help me to learn more?
(Other definitions for gerund that I've seen before include "Verb form used as a noun" , "Verb form functioning as a noun" , "Noun formed from a verb - red gun (anag)" , "item of grammar" , "-ing word functioning as a noun" .)