Depot gutter half-removed - ? (8)

I believe the answer is:

terminus

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'depot' is the definition.
(I know that depot can be written as terminus)

'gutter half-removed ?' is the wordplay.
'half' means to take half the letters.
'removed ?' becomes 'minus' (I am not sure about this - if you are sure you should believe this answer much more).
'gutter' with half the letters taken is 'ter'.
'ter'+'minus'='TERMINUS'

Can you help me to learn more?

(Other definitions for terminus that I've seen before include "Victoria, perhaps" , "Transport depot" , "Limit" , "Final stop" , "End - objective" .)

I've seen this clue in the Sydney Morning Herald.

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