A duck subsists on fruit, it seems (6)
I believe the answer is:
olives
'fruit it seems' is the definition.
I can't tell whether this definition defines the answer.
'a duck subsists on' is the wordplay.
'a duck' becomes 'o' (resembles zero - 'duck' in cricket).
'subsists' becomes 'lives' ('live' can be a synonym of 'subsist').
'on' means one lot of letters go next to another.
'o'+'lives'='OLIVES'
Can you help me to learn more?
(Other definitions for olives that I've seen before include "Yellowish green fruits" , "'Oddly, I loves these fruits (6)'" , "Small green Mediterranean tree fruits" , "Small green Mediterranean tree-fruits" , "Small green stone fruits, nice in cocktails" .)