Put an end to child holding on to rubbish elephant's head (8)

'put an end to child holding on to rubbish elephant's head' is the definition.
I can't judge whether this definition defines the answer.

'child holding on to rubbish elephant's head' is the wordplay.
'child' becomes 'kid' (synonyms).
'holding' means one lot of letters goes inside another.
'on' is a charade indicator (letters next to each other).
'to rubbish' becomes 'bosh' (I've seen this in another clue).
'head' suggests taking the first letters.
The first letter of 'elephant' is 'e'.
'bosh' next to 'e' is 'boshe'.
'kid' enclosing 'boshe' is 'KIBOSHED'.

Can you help me to learn more?