Girl to fix clothing for church, which is to be tight (5-5)

I believe the answer is:

penny-pinch

'is to be tight' is the definition.

'girl to fix clothing for church' is the wordplay.
'girl' becomes 'penny' (**).
'to fix clothing' becomes 'pin'.
'for' says to put letters next to each other.
'church' becomes 'ch' (common abbreviation).
'penny'+'pin'+'ch'='PENNY-PINCH'

'which' is the link.

I've seen this clue in The Guardian.

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