Scold them and get a plate to hold half of the salmon (8)
I believe the answer is:
admonish
'scold' is the definition.
(I've seen this before)
'a plate to hold half of the salmon' is the wordplay.
'plate' becomes 'dish' (type of plate).
'to hold' means one lot of letters goes inside another.
'half of' suggests halving the letters.
'salmon' cut in half is 'mon'.
'dish' enclosing 'mon' is 'dmonish'.
'a'+'dmonish'='ADMONISH'
'them and get' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for admonish that I've seen before include "Warn sternly" , "Mildly reprove" , "Reprove, take to task" , "Reprove, warn" , "Caution - reprimand" .)