Round the bend long ago (2,3)
I believe the answer is:
of old
'long ago' is the definition.
(thesaurus)
'round the bend' is the wordplay.
'round' becomes 'o' (round can mean a round object).
'the bend' becomes 'fold' ('fold' can be a synonym of 'bend').
'o'+'fold'='OF OLD'
(Other definitions for of old that I've seen before include "Long ago" , "In or from former times" , "these days? No!" , "belonging to the past" , "at one time?" .)