Flaw in flyers plugging this writer’s point (10)
I believe the answer is:
impairment
'flaw' is the definition.
(thesaurus)
'flyers plugging this writer's point' is the wordplay.
'flyers' becomes 'airmen' ('airman' can be a synonym of 'flyer').
'plugging' means one lot of letters goes inside another (I've seen this in other clues).
'this writer's' becomes 'im' ('writer's' could mean 'the crossword setter is').
'point' becomes 'pt' (abbreviation for point).
'im'+'pt'='impt'
'airmen' put within 'impt' is 'IMPAIRMENT'.
'in' is the link.
(Other definitions for impairment that I've seen before include "Disability" , "Injury" , "Weakening, damage" .)