Having a frightened look when the wife gets involved with a cad (5-5)

I believe the answer is:

white-faced

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'having a frightened look' is the definition.
I can't judge whether this defines the answer.

'the wife gets involved with a cad' is the wordplay.
'gets involved with' indicates an anagram.
'the'+'wife'='thewife'
'thewife' anagrammed with 'cad' makes 'WHITE-FACED'.

'when' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Independent.

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