Share out is tried but as an alternative (10)

I believe the answer is:

distribute

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'share out' is the definition.
(synonyms)

'is tried but as an alternative' is the wordplay.
'is tried but' can be anagrammed to 'DISTRIBUTE'.
Though, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for distribute that I've seen before include "Pass round" , "Deal out" , "spread" , "Give out" , "Supply" .)

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

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