Anne might get some form of jewel by way of a promise! (10)
I believe the answer is:
engagement
'a promise' is the definition.
(I know that engagement is a type of promise)
'anne might get some form of jewel by way' is the wordplay.
I cannot quite see how this works, but
'get' could be 'engage' (engaging is a kind of getting) and 'engage' is found in the answer.
'way' could be 'n' (Compass direction - North) and 'n' is located in the answer.
The remaining letters 'met' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Other definitions for engagement that I've seen before include "fighting" , "Betrothal; appointment" , "Action necessary for breach" , "calls for signs of commitment" , "Agreement to marry" .)