The prime mover, the Italian, will jeopardise everything (7)
I believe the answer is:
imperil
'jeopardise everything' is the definition.
I can't tell whether this defines the answer.
'the prime mover the italian' is the wordplay.
I cannot really understand how this works, but
an anagram of 'prime' is 'imper' which is present in the answer.
'italian' could be 'i' (abbreviation for Italian) and 'i' is found within the answer.
A single letter 'l' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'will' is the link.
Can you help me to learn more?
(Other definitions for imperil that I've seen before include "Put in danger" , "Jeopardize" , "Put at risk" , "Endanger" , "Expose" .)