Mineral deposit right in missile launch area? (5)

I believe the answer is:

ochre

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'mineral' is the definition.
(ochre is a kind of mineral)

I can't explain the rest of the clue.

(Other definitions for ochre that I've seen before include "A shade" , "Light yellow-brown colour" , "Money" , "Red or yellow pigment" , "Orange" .)

I've seen this clue in The Times.

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