8 across Post and ante perhaps 5 O-a-
6 down induced to become religious (3 2 7) I have --- to believe. Possibly Led to believe which would then make 8 across o-a-e
The O comes from eloquence 4 down a sound quality. The post and ante could be stake without the o. it couldn't be natal - which is where I started because the a comes from Erato which is a muse and definitely right. In terms of eloquence the u-n-e are absolutely right so the word for a sound quality ends most likely in unce - and if stake was right it would be ??s?u?n?e