Tiresome fellow with promises of payment (7)

I believe the answer is:

tedious

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'tiresome' is the definition.
(synonyms)

'fellow with promises of payment' is the wordplay.
'fellow' becomes 'ted' (man's name).
'with' is a charade indicator (letters next to each other).
'promises of payment' becomes 'ious' (I can't explain this - if you can you should believe this answer much more).
'ted'+'ious'='TEDIOUS'

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(Other definitions for tedious that I've seen before include "not exciting" , "Wearisome, boring" , "drab" , "flat" , "Banal" .)

I've seen this clue in the Evening Standard.

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