Definition of a peg to hang something on in English:

a peg to hang something on

Something used as a pretext or occasion for the treatment of a wider subject: he is used as a peg on which to hang the intricate meshwork of diplomatic relations
See parent entry: peg

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day deictic
Pronunciation: ˈdeɪktɪk
adjective
denoting a word whose meaning depends on context...