Crossword Genius

Make uniform and flag with one or two directions (11)

Ross

I believe the answer is:

standardise

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

'make uniform' is the definition.
('make uniform'->'standardize' is in my internal thesaurus and 'ize'->'ise')

'flag with one or two directions' is the wordplay.
I cannot really see how this works, but
'flag' could be 'standard' (standard is a kind of flag) and 'standard' is located in the answer.
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
'directions' could be 'se' (I've seen this in other clues) and 'se' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'and' is the link.

Can you help me to learn more?

(Another definition for standardise that I've seen is " Idea strands? (anag)".)

I've seen this clue in The Daily Express.
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