Takes occupation when Dr Vine's out (5,2)

'takes occupation' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot see how one could define the other.

'dr vine's out' is the wordplay.
'dr' becomes 'mo' (abbreviation for medical officer).
'out' is an anagram indicator (out can mean wrong or inaccurate).
'vines' with letters rearranged gives 'vesin'.
'mo'+'vesin'='MOVES IN'

'when' acts as a link.

Can you help me to learn more?