Peacekeepers — shame — are in the dark (7)

I believe the answer is:

unaware

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'are in the dark' is the definition.
(I've seen this before)

'peacekeepers shame' is the wordplay.
'peacekeepers' becomes 'UN' (United Nations, peacekeeping organisation).
'shame' becomes 'aware' (I can't justify this - if you can you should believe this answer much more).
'un'+'aware'='UNAWARE'

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(Other definitions for unaware that I've seen before include "Without knowledge" , "Uninformed" , "Not knowing (of a situation or fact)" , "Not informed - ignorant (of)" , "Heedless" .)

I've seen this clue in The Sunday Times and The Times.

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