Here's one glutton for starters (3)
I believe the answer is:
hog
'here's one glutton for starters' is the definition.
I can't judge whether this defines the answer.
'here's one glutton for starters' is the wordplay.
'for starters' says to take the initial letters.
The initial letters of 'heres one glutton' is 'HOG'.
Can you help me to learn more?
(Other definitions for hog that I've seen before include "Greedy person or pig for slaughter" , "Take more than one's share" , "Pig; hoard selfishly" , "Domesticated pig" , "Porker" .)