Review of theatre dossier reveals play by Synge (6,2,3,3)

I believe the answer is:

riders to the sea

'play by synge' is the definition.
(play by John Millington Synge)

'review of theatre dossier' is the wordplay.
'review of' is an anagram indicator.
'theatre'+'dossier'='theatredossier'
'theatredossier' with letters rearranged gives 'RIDERS TO THE SEA'.

'reveals' is the link.

I've seen this clue in The Independent.

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