Groups put in care neglected, looking back (6)

I believe the answer is:

genera

I'm a little stuck... Click here to teach me more about this clue!

'groups put' is the definition.
'genera' can be an answer for 'groups' (more than one biological genus). I am unsure of the 'put' bit.

'in care neglected looking back' is the wordplay.
'in' indicates a hidden word.
'looking back' is a reversal indicator.
'areneg' is hidden in the letters of 'care neglected'.
'areneg' in reverse letter order is 'GENERA'.

Can you help me to learn more?

(Other definitions for genera that I've seen before include "Types" , "Taxonomic categories (biology)" , "Group of organisms" , "Forms" , "Groups with common characteristics" .)

I've seen this clue in The Telegraph.

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