Hastily made and hoisted a flag (3,2)

I believe the answer is:

ran up

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'hoisted a flag' is the definition.
'ran up' can be an answer for 'hoisted' ('run up' can be a synonym of 'hoist'). I am not certain of the 'a flag' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for ran up that I've seen before include "significant rise" , "Accumulated" , "Sewed together quickly" .)

I've seen this clue in The Globe and Mail.

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