The spirit with which a snap may be taken (6)
I believe the answer is:
Here is my best explanation:
'the spirit' is the definition.
(I've seen this before)
'with which a snap may be taken' is the wordplay.
I cannot quite see how this works, but
'with' could be 'and' and 'and' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?