Are such blows seen in good jousting practice? (8)
I believe the answer is:
glancing
'are such blows seen' is the definition.
(as in the phrase glancing blow)
'good jousting practice?' is the wordplay.
'good' becomes 'g' (abbreviation).
'jousting practice?' becomes 'lancing' (jousting was medieval fighting with lances).
'g'+'lancing'='GLANCING'
'in' acts as a link.
(Other definitions for glancing that I've seen before include "Taking a brief look" , "Having a quick look" , "Giving a brief look" , "Glimpsing" , "blows are like this" .)