Of course, warning was rejected as expected (7)
I believe the answer is:
foresaw
'expected' is the definition.
(I've seen this before)
'of course warning was rejected' is the wordplay.
'course' indicates an anagram (course can mean to flow or move around).
'warning' becomes 're' (I am not sure about this - if you are sure you should believe this answer much more).
'rejected' says the letters should be written backwards.
'was' in reverse letter order is 'saw'.
'of' anagrammed gives 'fo'.
'fo'+'re'+'saw'='FORESAW'
'as' is the link.
Can you help me to learn more?
(Other definitions for foresaw that I've seen before include "Predicted" , "Anticipated" , "Expected" .)