Bold resistance from French boy she has agreed to marry (8)
I believe the answer is:
defiance
'bold resistance' is the definition.
(I've seen this before)
'french boy she has agreed to marry' is the wordplay.
I cannot quite understand how this works, but
'french' could be 'f' (abbreviation) and 'f' is found in the answer.
'boy' could be 'ian' (man's name) and 'ian' is found within the answer.
'she' could be 'de' and 'de' is found in the answer.
This explanation may well be incorrect...
'from' is the link.
Can you help me to learn more?
(Other definitions for defiance that I've seen before include "to make a challenge" , "bold opposition" , "Resistance to authority" , "Refusal to comply" , "Insubordination" .)