Crossword Genius

Fair, therefore bang on (4,2)

Ross

I believe the answer is:

just so

'bang on' is the definition.

'fair therefore' is the wordplay.
'fair' becomes 'just' ('just' can be a synonym of 'fair'**).
'therefore' becomes 'so'.
'just'+'so'='JUST SO'

(Other definitions for just so that I've seen before include "Carefully planned" , "I agree!" , "how some stories were described" , "In a careful manner" , "Like Kipling's stories" .)

I've seen this clue in The Guardian.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.