Green’s Dictionary of Slang

College Street solicitor n.

[College Street, Sydney, a gay centre since the mid-19C. The street runs into Queen’s Square, itself frequented by lawyers visiting the nearby law courts; thus giving puns on queen n. (2) and SE solicitor]

(Aus.) a male prostitute.

[Aus]G. Seal Lingo 116: An aspro was a term for a male prostitute [...] and in Sydney during the 1940 such persons were reportedly known as college street solicitors.