Boy's name for a London bridge (6)

I believe the answer is:
albert
'a london bridge' is the definition.
The definition suggests a singular noun which matches the answer.
'boy's name' is the wordplay.
'boy' becomes 'al'.
'name' becomes 'bert' ().
'al'+'bert'='ALBERT'
'for' is the link.
Can you help me to learn more?
(Other definitions for albert that I've seen before include "- - Finney" , "- Square, Walford (EastEnders)" , "Queen Victoria's consort or familiar ex-Taoiseach" , "Short kind of watch-chain" , "Victoria's partner" .)
