To iron out is to smooth away the last small problems. Iron out the details, iron out the difficulties, a few things to iron out.
It implies the main work is done and only wrinkles remain, which is why it sounds reassuring in meetings. The picture is literal and comes straight from pressing cloth.
1phraseiron outTo smooth away the last small problems.
“There are two clauses left to iron out before signing.”
iron out is a phrase.
Also accepted in games: resolve
Practised in Phrasal Verbs