Taxonomic groups split into individuals of similar age (10)
I believe the answer is:
generation
'individuals of similar age' is the definition.
'generation' can be an answer for 'age' (thesaurus). I'm not sure about the 'individuals of similar' bit.
'taxonomic groups split into' is the wordplay.
'taxonomic groups' becomes 'genera' (genus is a kind of taxonomic group).
'split' is an anagram indicator (letters split up and reassembled).
'into' is an anagram of 'tion'.
'genera'+'tion'='GENERATION'
Can you help me to learn more?
(Other definitions for generation that I've seen before include "People of the same age" , "what was lost in WW1" , "Everyone of same age" , "young" , "About thirty years'" .)