Observe servant providing quantity of dripping? (7)

I believe the answer is:

seepage

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'quantity of dripping?' is the definition.
'seepage' can be an answer for 'dripping?' (thesaurus). I'm unsure of the 'quantity of' bit.

'observe servant' is the wordplay.
'observe' becomes 'see' (I've seen this before).
'servant' becomes 'page' (I've seen this before).
'see'+'page'='SEEPAGE'

'providing' acts as a link.

Can you help me to learn more?

(Other definitions for seepage that I've seen before include "Slow leakage" , "Slow leaking flow" , "Leaking liquid" , "running out slowly" , "Loss from slow leak" .)

I've seen this clue in The Telegraph.

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