Duck, then another ancient Briton saves for cat (6)
I believe the answer is:
ocelot
'for cat' is the definition.
(type of wild cat)
'duck then another ancient briton saves' is the wordplay.
'duck then' becomes 'o' (resembles zero - 'duck' in cricket. I am not sure about the 'then' bit.).
'another' becomes 'o' (I've seen this in other clues).
'ancient briton' becomes 'celt' (I've seen this before).
'saves' is an insertion indicator.
'o' inserted within 'celt' is 'celot'.
'o'+'celot'='OCELOT'
Can you help me to learn more?
(Other definitions for ocelot that I've seen before include "Wild cat of the Americas" , "Nocturnal wild cat of Central and South America" , "Wild cat, native to Central and South America - loo etc (anag)" , "South and Central American wildcat" , "Yellow-black striped and spotted cat" .)