Good person facing danger -- ultimately I have to try very hard (6)
I believe the answer is:
strive
'try very hard' is the definition.
(I've seen this before)
'good person facing danger ultimately i have' is the wordplay.
'good person' becomes 'st' (saint).
'facing' is a charade indicator (letters next to each other).
'ultimately' indicates one should take the final letters.
'i have' becomes 'ive' (**).
The final letter of 'danger' is 'r'.
'st'+'r'+'ive'='STRIVE'
'to' acts as a link.
(Other definitions for strive that I've seen before include "Try hard, make an effort" , "Try hard, carry on conflict" , "Make every effort" , "Exert much effort" , "Vie; compete" .)