Crossword Genius

Annoying editor promises to pay after end of August (7)

Ross

I believe the answer is:

tedious

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

'annoying' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

'editor promises to pay after end of august' is the wordplay.
'editor' becomes 'ed' (abbreviation).
'promises to pay' becomes 'IOU's' (promises to pay a debt).
'after' is a charade indicator (letters next to each other).
'end of' indicates one should take the final letters.
The last letter of 'august' is 't'.
'ed'+'ious'='edious'
'edious' put after 't' is 'TEDIOUS'.

Can you help me to learn more?

(Other definitions for tedious that I've seen before include "Tiresome, boring" , "drab" , "Dull as ditchwater" , "Humdrum" , "Banal" .)

I've seen this clue in The Telegraph.
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