Complete freedom for cast (5)

I believe the answer is:

fling

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'for cast' is the definition.
(both can mean to throw)

I can't explain the remainder of the clue.

(Other definitions for fling that I've seen before include "Launch or propel" , "Throw as in Highland dance?" , "good time" , "Brief affair; throw" , "Throw angrily in spell of indulgent pleasure" .)

I've seen this clue in The Globe and Mail.

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