Bluffer

2 clues
Four-flusher
Almost see Letterman rearing ducks (6)
Similar answers:
Ablue
Abluent
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Acceptsaahoffer
Actsindifferent
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Adifferentworld
Afferent
Afroblue
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Agedifference
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Ajeffersonbbettecowen
Aliceblue
Amiblue
Andblue
Apatchofblue
Aquablue