Name that identifies savings account? (5)

I believe the answer is:

isaac

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'name that' is the definition.
The definition suggests a singular noun which matches the answer.

'savings account?' is the wordplay.
'savings' becomes 'isa' (I've seen this before).
'account?' becomes 'ac' (abbreviation).
'isa'+'ac'='ISAAC'

'identifies' acts as a link.

Can you help me to learn more?

(Other definitions for isaac that I've seen before include "Man's name" , "man whose sons bargained over 3 [A MESS OF POTAGE]" , "Son almost sacrificed" , "one in Genesis" , "OT near-sacrificial victim" .)

I've seen this clue in The Telegraph.

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