Cause of embarrassment, crazy family (6,4)

I believe the answer is:

banana skin

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'cause of embarrassment' is the definition.
(I've seen this before)

'crazy family' is the wordplay.
'crazy' becomes 'bananas' (I can't justify this - if you can you should believe this answer much more).
'family' becomes 'kin' (synonyms).
'bananas'+'kin'='BANANA SKIN'

Can you help me to learn more?

(Other definitions for banana skin that I've seen before include "Something causing downfall (colloq.)" , "Potential disaster" , "Potential for accident, embarrassment" , "potential trouble" , "Potential downfall" .)

I've seen this clue in The Times.

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