Crossword Genius

News here soon at church, with changes around small room (5,4,5)

Ross

I believe the answer is:

watch this space

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

'news here soon' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'at church with changes around small room' is the wordplay.
I cannot quite understand how this works, but
'at' is within the answer.
'church' could be 'ch' (common abbreviation) and 'ch' is located in the answer.
an anagram of 'with' is 'wthi' which is within the remaining letters.
'around' could be 'c' (abbreviation for 'circa') and 'c' is found within the answer.
'small' could be 's' (abbreviation - e.g. clothes size) and 's' is found in the answer.
The remaining letters 'spae' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for watch this space that I've seen before include "more information later" , "Look at what I'm doing with room" , "Details to follow" .)

I've seen this clue in The Times.
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