Crossword Genius

A chasm you keep well away from (5)

Ross

I believe the answer is:

avoid

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

'keep well away from' is the definition.
I can't tell whether this definition defines the answer.

'a chasm' is the wordplay.
'chasm' becomes 'void' (I can't justify this - if you can you should give a lot more credence to this answer).
'a'+'void'='AVOID'

'you' is the link.

Can you help me to learn more?

(Other definitions for avoid that I've seen before include "Get out of" , "Prevent from happening; nullify (law)" , "Keep away from (someone/something)" , "Shy away from" , "invalidate" .)

I've seen this clue in the Evening Standard.
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