Manage now to tend to (10)

I believe the answer is:

administer

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'manage' is the definition.
(I know that manage is a more specific form of the action administer)

'now to tend to' is the wordplay.
'now' becomes 'AD' (AD, Anno Domini, as opposed to BC, Before Christ).
'to tend to' becomes 'minister' (I am not sure about this - if you are sure you should believe this answer much more).
'ad'+'minister'='ADMINISTER'

Can you help me to learn more?

(Other definitions for administer that I've seen before include "act as manager" , "Dispense" , "give" , "Govern" , "conduct" .)

I've seen this clue in the Evening Standard.

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