Crossword Genius

"Adjust church communion table," we're told (5)

Ross

I believe the answer is:

alter

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

'adjust church' is the definition.
'alter' can be an answer for 'adjust' (I've seen this before). I am unsure of the 'church' bit.

'communion table we're told' is the wordplay.
'communion table' becomes 'altar' (synonyms).
'we're told' indicates a 'sounds like' (homophone) clue.
'altar' is a homophone of 'ALTER'.

Can you help me to learn more?

(Other definitions for alter that I've seen before include "Change, maybe later" , "Revise" , "Adapt" , "Amend" , "shift" .)

I've seen this clue in The Telegraph.
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