Run up, as debts (5)

I think it could be either:

Which length description are you looking for?:

incur

'run up as debts' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for incur that I've seen before include "Bring on oneself, say costs" , "Fall into - invite" , "Invite, bring about" , "Meet" , "Become subject to (penalty)" .)

I've seen this clue in The Washington Post, the Penny Press, the Newsday.com, The New York Times, the L.A. Times Daily and the Family Time.

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