Such a frame gives a still picture (6)

I believe the answer is:

freeze

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But I can't explain it at all! Could you help me understand?

(Other definitions for freeze that I've seen before include "Become icy" , "Solidify with cold" , "period of cold weather" , "Solidify due to decrease in temperature" , "Turn to ice" .)

I've seen this clue in The Hindu.

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