Henry's off cannabis, limiting vacation (8)

'vacation' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'henry's off cannabis limiting' is the wordplay.
'henry' becomes 'H' (symbol for the unit of electrical inductance).
'off' indicates named letters should be taken away (some letters taken off).
'cannabis' becomes 'hemp' (I've seen this before).
'limiting' becomes 'tying' (tying is a kind of limiting).
'hemp' with 'h' removed is 'emp'.
'emp'+'tying'='EMPTYING'

Can you help me to learn more?