Press employee with glasses covering one key taxonomic group (10)

I believe the answer is:

subspecies

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'taxonomic group' is the definition.
(I know that subspecies is a type of taxonomic group)

'press employee with glasses covering one key' is the wordplay.
'press employee' becomes 'sub' (subeditor).
'with' says to put letters next to each other.
'glasses' becomes 'specs' (short for spectacles).
'covering' indicates putting letters inside.
'one key' becomes 'ie' (I can't justify this - if you can you should believe this answer much more).
'specs' placed around 'ie' is 'species'.
'sub'+'species'='SUBSPECIES'

Can you help me to learn more?

(Another definition for subspecies that I've seen is " Lowest taxonomic group in zoology".)

I've seen this clue in The Times.

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