Crossword Genius

Good, well-developed and sensible (8)

Ross

I believe the answer is:

grounded

(Other definitions for grounded that I've seen before include "Earthed" , "prevented from leaving home" , "Punished teenager by confining to house - poor underdog" , "Prevented from flying" , "Not allowed to fly" .)

I've seen this clue in The Sun.
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