Crossword Genius

Post-prandial activity in Waugh's novel on power (7-2)

Ross

I believe the answer is:

washing-up

I'm a little stuck... Click here to teach me more about this clue!

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

'in waugh's novel on power' is the wordplay.
'novel' indicates anagramming the letters (letters in a new or novel order).
'on' indicates putting letters inside (as in clothing 'on' a person).
'power' becomes 'p' (symbol in physics).
'waughs' anagrammed gives 'washgu'.
'in' going within 'washgu' is 'washingu'.
'washingu'+'p'='WASHING-UP'

Can you help me to learn more?

(Other definitions for washing-up that I've seen before include "Kitchen chore" , "Dirty crockery, etc." , "Kitchen task" .)

I've seen this clue in The Telegraph.
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