Crossword Genius

Dangerous fly in action that sets everyone in panic (6)

Ross

I believe the answer is:

I'm a little stuck... Click here to teach me more about this clue!

'dangerous fly' is the definition.
'tsetse' can be an answer for 'fly' (tsetse is a kind of fly). I'm not certain of the 'dangerous' bit.

'action that sets everyone in panic' is the wordplay.
'TSETSE' is hidden within the letters.
However, I am not sure how this is indicated.

'in' is the link.

Can you help me to learn more?

(Other definitions for tsetse that I've seen before include "bloodsucker", "Disease-carrying fly", "cause of sleepiness?", "fly across Africa", "flies".)

I've seen this clue in Sydney Morning Herald.