See news is yet to unfold? They may when it does (12)

I believe the answer is:

eyewitnesses

'they may when it does' is the definition.
The definition suggests an adverb but the answer is not.

'see news is yet to unfold?' is the wordplay.
'to unfold?' indicates anagramming the letters (I've seen 'unfolding' mean this (untangle or unfold the original letter order)).
'see'+'news'+'is'+'yet'='seenewsisyet'
'seenewsisyet' anagrammed gives 'EYEWITNESSES'.

I've seen this clue in The Times.

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