Short, high-pitched sound (6)

I believe the answer is:

squeak

(Other definitions for squeak that I've seen before include "Mouse's cry" , "Bubble and --" , "'High-pitched, screeching noise (6)'" , "(Succeed by) a narrow margin" , "Sound of a mouse" .)

I've seen this clue in The Irish Times and the Irish Times (Simplex).

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