The Gibraltarian's table (5)

I believe the answer is:

altar

I'm a little stuck... Click here to teach me more about this clue!

'table' is the definition.
(I know that altar is a type of table)

'the gibraltarian's' is the wordplay.
'ALTAR' is hidden in amongst the letters.
But, I am uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for altar that I've seen before include "Consecrated table in church" , "Communion table" , "Place of worship" , "Table for religious sacrifices or ceremonies" , "Main feature in church" .)

I've seen this clue in the Evening Standard.

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