The initial idioms of the letter O

odour	oeuvre
of	of a certain age
of a kind	of a mind to
of a single mind	of a size
of a sort	of age
of all people	of all places
Of all the nerve!	of all things
Of all things!	of a morning/afternoon/evening
of benefit	of biblical proportions
of choice	of consequence
of course	of few words
of few words, man of	of great price
of (someone's) ilk	of interest
of late	to no avail
of little avail	of mature years