Gutted over dangerous dog circling item (7)
I believe the answer is:
orbiter
'circling item' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'gutted over dangerous dog' is the wordplay.
'gutted' says to hollow out the word (remove centre letters) (to gut something is to remove its insides).
'dangerous dog' becomes 'biter' (I've seen this in another clue).
'over' with its middle taken out is 'or'.
'or'+'biter'='ORBITER'
Can you help me to learn more?
(Other definitions for orbiter that I've seen before include "Space vehicle" , "One goes round" , "Satellite perhaps" , "Craft going round planet" , "Non-landing spacecraft" .)