Lacking sufficient water in Kalahari Desert (4)

I believe the answer is:

arid

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'lacking sufficient water in kalahari desert' is the definition.
I can't tell whether this defines the answer.

'in kalahari desert' is the wordplay.
'in' indicates a hidden word.
'ARID' is hidden within 'kalahari desert'.

Can you help me to learn more?

(Other definitions for arid that I've seen before include "Dry and infertile" , "(Of an area) very dry" , "Dry and sere" , "Dry and withered" , "Dry, devoid of interest" .)

I've seen this clue in The Telegraph.

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