We start swearing about wicked flour beetles (7)

I believe the answer is:

weevils

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'flour beetles' is the definition.
'weevils' can be an answer for 'beetles' (weevil is a kind of beetle). I am not certain of the 'flour' bit.

'we start swearing about wicked' is the wordplay.
'start' suggests taking the first letters.
'about' says to put letters next to each other.
'wicked' becomes 'evil' (associated in meaning).
The first letter of 'swearing' is 's'.
's' after 'evil' is 'evils'.
'we'+'evils'='WEEVILS'

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I've seen this clue in the Sydney Morning Herald.

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