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Be
unfaithful
to
Charlie
with
passion
and
touching
(5,2)
Be unfaithful to Charlie with passion and touching (5,2)
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The definition is at the beginning of the clue.
How the clue works
Right, so Be unfaithful to is your definition there, that's just cheating on someone. For the wordplay, take C, which is Charlie in the phonetic alphabet, then bolt on HEAT for passion, then ON for touching — string those together and you've got your answer.