Crossword Genius

Though less than satisfactory, what EV's range is? (2,3,2,2,4)

Ross

I believe the answer is:

as far as it goes

I'm a little stuck... Click here to teach me more about this clue!

'though less' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'satisfactory what ev's range is?' is the wordplay.
I cannot quite understand how this works, but
'satisfactory' could be 's' (abbreviation in education) and 's' is found in the answer.
'is?' could be 'goes' (going is a kind of being) and 'goes' is present in the answer.
This explanation may well be incorrect...

'than' acts as a link.

Can you help me to learn more?

(Other definitions for as far as it goes that I've seen before include "up to a point" , "to some degree" , "Possible range" , "Within certain limitations (2,3,2,2,4)" , "Bearing in mind certain limitations" .)

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