Crossword Genius

Promise oddly glum American organised support (9)

Ross

I believe the answer is:

guarantee

'promise' is the definition.
(guaranteeing is a kind of promising)

'oddly glum american organised support' is the wordplay.
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
'american' becomes 'a' (common abbreviation - e.g. in organisation names).
'organised' becomes 'ran' (I've seen this before).
'support' becomes 'tee' (tee is a kind of support).
The alternate letters of 'glum' are 'gu'.
'gu'+'a'+'ran'+'tee'='GUARANTEE'

(Other definitions for guarantee that I've seen before include "Provide financial security for" , "Formal assurance" , "Assurance, warranty" , "Promising" , "Warranty, pledge" .)

I've seen this clue in The Telegraph.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.