Crossword Genius

Ripple disturbed twelve outside space centre (7)


I believe the answer is:


'ripple' is the definition.
(I know that ripple can be written as wavelet)

'disturbed twelve outside space centre' is the wordplay.
'disturbed' indicates an anagram (the order of letters is disturbed).
'outside' means one lot of letters goes inside another (some letters go outside others).
'centre' indicates the central letters.
The centre of 'space' is 'a'.
'twelve' anagrammed gives 'wvelet'.
'wvelet' enclosing 'a' is 'WAVELET'.

I've seen this clue in The Guardian.
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