Origin of Species being important? Not a lot! (10)
I believe the answer is:
smattering
'not a lot' is the definition.
I can't judge whether this definition defines the answer.
'origin of species being important?' is the wordplay.
'origin of' suggests taking the first letters.
'being important?' becomes 'mattering'.
The first letter of 'species' is 's'.
's'+'mattering'='SMATTERING'
Can you help me to learn more?
(Other definitions for smattering that I've seen before include "Tiny amount (of knowledge)" , "Taste" , "Hint" , "Dash" , "superficial knowledge" .)