Mistakes of line taken by post-war generation (8)
I believe the answer is:
bloomers
'mistakes' is the definition.
(I've seen this before)
'line taken by post-war generation' is the wordplay.
'line' becomes 'l'.
'taken by' means one lot of letters goes inside another.
'post-war generation' becomes 'boomers' (the baby boomer generation).
'l' inserted within 'boomers' is 'BLOOMERS'.
'of' is the link.
(Other definitions for bloomers that I've seen before include "clothes" , "Mistakes, underpants, loaves or flowers" , "Bread - mistakes - underwear" , "Boobs" , "Undergarment" .)