Crossword Genius

Barren aliens over anger (7)

Ross

I believe the answer is:

sterile

'barren' is the definition.
(I've seen this in another clue)

'aliens over anger' is the wordplay.
'aliens' becomes 'ETs' (ET is short for extraterrestrial).
'over' is a reversal indicator.
'anger' becomes 'rile' (rile can mean to annoy or anger).
'ets' written backwards gives 'ste'.
'ste'+'rile'='STERILE'

(Other definitions for sterile that I've seen before include "Not producing offspring" , "Unable to have children" , "Ineffective" , "Germ-free" , "Incapable of reproducing" .)

I've seen this clue in The Daily Express.
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