Crossword Genius

Basic alert with enemy on the move (10)

Ross

I believe the answer is:

elementary

'basic' is the definition.
('elementary' can be similar in meaning to 'basic')

'alert with enemy on the move' is the wordplay.
'with' is a charade indicator (letters next to each other).
'on the move' indicates anagramming the letters.
'alert'+'enemy'='alertenemy'
'alertenemy' with letters rearranged gives 'ELEMENTARY'.

(Other definitions for elementary that I've seen before include "Primary" , "No problem" , "One precursor to 7 [SECONDARY MODERN]" , "Simple, my dear Watson!" , "description of subatomic particle" .)

I've seen this clue in The Independent.
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