Almost spotless city male does for prime minister (7)

'for prime minister' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'almost spotless city male' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'spotless' becomes 'white'.
'city' becomes 'LA' (Los Angeles).
'male' becomes 'm' (common abbreviation).
'white' with its final letter taken off is 'whit'.
'whit'+'la'+'m'='WHITLAM'

'does' is the link.

Can you help me to learn more?