Linger — be undecided (about something) (5)

I believe the answer is:

hover

(Other definitions for hover that I've seen before include "Wait around (like a kestrel)" , "sky - so remain there?" , "Float above in the air, perhaps a craft" , "Remain stationary while aloft" , "What some cross-Channel craft do" .)

I've seen this clue in The Guardian.

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