Appeared indistinctly in a threatening form (6)

I believe the answer is:

loomed

(Other definitions for loomed that I've seen before include "Appeared indistinctly, as in a mist" , "Rose up menacingly ahead" , "Came into view indistinctly, often threateningly" , "came ominously close" , "Soared threateningly ahead" .)

I've seen this clue in The Irish Times.

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