Some stupendous tip (5)

I believe the answer is:

upend

'tip' is the definition.
(I've seen this before)

'some stupendous' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'UPEND' can be found hidden inside 'stupendous'.

(Other definitions for upend that I've seen before include "Make a turnover" , "Set on side, turn over" , "Turn upside-down" , "Knock over" , "Set upside down" .)

I've seen this clue in the Sydney Morning Herald.

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