Keep away from a chasm (5)
I believe the answer is:
avoid
'keep away' is the definition.
(I've seen this in another clue)
'a chasm' is the wordplay.
'chasm' becomes 'void' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'a'+'void'='AVOID'
'from' is the link.
Can you help me to learn more?
(Other definitions for avoid that I've seen before include "Bypass" , "Evade - escape" , "Fend off" , "(If you can't 10), keep away from" , "Duck" .)