Six-nil for a time? That's bad! (7)
I believe the answer is:
violent
'bad' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?
'six-nil for a time?' is the wordplay.
'six' becomes 'VI' (Roman numerals).
'nil' becomes 'O' (O resembles 0).
'for' says to put letters next to each other.
'a time?' becomes 'lent' (I have seen 'Time of fasting ' mean 'lent' so perhaps 'time' could also mean 'lent').
'vi'+'o'+'lent'='VIOLENT'
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for violent that I've seen before include "Marked by physical force" , "Brutal - intense" , "Using extreme physical force" , "Tending to use intimidatory force" , "Wild - not evil (anag)" .)