Dies out in tiresome fashion (7)

I believe the answer is:

tedious

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

'dies out in tiresome fashion' is the definition.
I can't judge whether this definition defines the answer.

'dies out in tiresome fashion' is the wordplay.
'dies out' can be anagrammed to 'TEDIOUS'.
Though, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for tedious that I've seen before include "Dull as ditchwater" , "not worth listening to?" , "drab" , "Outside (anag.)" , "Boring, monotonous" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app