Crossword Genius

Get rid of silver held back by one in wedding service? (4,7)

Ross

I believe the answer is:

fire brigade

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

'wedding service?' is the definition.
The definition and answer can be both groups as well as being singular nouns.
Maybe you can see an association between them that I can't see?

'get rid of silver held back by one in' is the wordplay.
'get rid of' becomes 'fire' (as in firing from a job).
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'held back' says the letters should be written backwards.
'by one' becomes 'bride' (I am not sure about this - if you are sure you should believe this answer much more).
'in' is an insertion indicator.
'ag' in reverse letter order is 'ga'.
'ga' placed within 'bride' is 'brigade'.
'fire'+'brigade'='FIRE-BRIGADE'

Can you help me to learn more?

(Other definitions for fire brigade that I've seen before include "Blaze tacklers" , "9a 19d" , "rescuers" , "Organised group to combat conflagrations" .)

I've seen this clue in The Times.
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