Great rocks appearing after work turning over kitchen garden (7)
I believe the answer is:
potager
'kitchen garden' is the definition.
(I've seen this before)
'great rocks appearing after work turning over' is the wordplay.
'rocks' is an anagram indicator.
'appearing after' says to put letters next to each other.
'work' becomes 'op' (abbreviation for opus**).
'turning over' shows that the letters should be reversed in order.
'op' reversed gives 'po'.
'great' is an anagram of 'tager'.
'tager' after 'po' is 'POTAGER'.
(Another definition for potager that I've seen is " kitchen garden".)