Crossword Genius

Expression of annoyance from Ken - gross seafood is ordered (3,8,4)

Ross

I believe the answer is:

for goodness sake

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'expression of annoyance' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'ken gross seafood is ordered' is the wordplay.
'is ordered' indicates an anagram.
'ken'+'gross'+'seafood'='kengrossseafood'
'kengrossseafood' is an anagram of 'FOR GOODNESS SAKE'.

'from' is the link.

Can you help me to learn more?

(Other definitions for for goodness sake that I've seen before include "Words of exasperation" , "Really!" , "please!" .)

I've seen this clue in The Daily Express.
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