Move lightly across ravine (4)
I believe the answer is:
pass
This might be a double definition.
'move' is the first definition.
(I know that pass is a more specific form of the action move)
'lightly across ravine' is the second definition.
'pass' can be an answer for 'ravine' (pass can mean a ravine). I'm unsure of the 'lightly across' bit.
Can you help me to learn more?
(Other definitions for pass that I've seen before include "good performance by exam candidate" , "acceptable exam result" , "Spend (19, say) -- don't know" , "Progress" , "Get beyond" .)