Starter of gazpacho with a mostly tough mushroom: it might stop you getting more food (7,7)

'it might stop you getting more food' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'starter of gazpacho with a mostly tough mushroom' is the wordplay.
'starter of' says to take the initial letters.
'with' says to put letters next to each other.
'mostly tough' becomes 'stric' (I can't justify this - if you can you should believe this answer much more).
'mushroom' becomes 'balloon' (both can mean grow very quickly).
The first letter of 'gazpacho' is 'g'.
'g'+'a'+'stric'+'balloon'='GASTRIC BALLOON'

Can you help me to learn more?