Resistance of presenter in London is tempting you initially (9)

'resistance' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'presenter in london is tempting you initially' is the wordplay.
'presenter' becomes 'host' (as in the host of a TV show).
'initially' indicates taking the first letters.
The initial letters of 'in london is tempting you' is 'ility'.
'host'+'ility'='HOSTILITY'

'of' is the link.

Can you help me to learn more?