Crossword Genius

Batty aunt's idea: covering lake with cream (6,6)

Ross

I believe the answer is:

suntan lotion

'cream' is the definition.

'batty aunt's idea covering lake' is the wordplay.
'batty' indicates an anagram.
'idea' becomes 'notion' (notion is a kind of idea).
'covering' is an insertion indicator.
'lake' becomes 'l' (geographical abbreviation).
'notion' enclosing 'l' is 'nlotion'.
'aunts' with letters rearranged gives 'sunta'.
'sunta'+'nlotion'='SUNTAN LOTION'

'with' acts as a link.

(Another definition for suntan lotion that I've seen is " Preparation used by sunbathers".)

I've seen this clue in The Everyman puzzle in The Observer.
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