A chore, endless, capturing latitude - in this? (5)

I believe the answer is:

atlas

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'this?' is the definition.
The definition suggests a singular noun which matches the answer.

'a chore endless capturing latitude in' is the wordplay.
'chore' becomes 'task' (synonyms).
'endless' means to remove the last letter.
'capturing latitude' becomes 'l' (I can't explain this - if you can you should believe this answer much more).
'in' is an insertion indicator.
'task' with its last letter removed is 'tas'.
'tas' placed around 'l' is 'tlas'.
'a'+'tlas'='ATLAS'

Can you help me to learn more?

(Other definitions for atlas that I've seen before include "A geog. book; N. African range" , "Book of maps or charts" , "used for maps" , "Book of geography" , "Sky carrier - map book" .)

I've seen this clue in The Independent.

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