Threads about plugging Boris Johnson's statements? (6)
I believe the answer is:
fibres
'threads' is the definition.
(fibre is a type of thread)
'about plugging boris johnson's statements?' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'plugging' indicates putting letters inside (I've seen this in other clues).
'boris johnson's statements?' becomes 'fibs' (Boris Johnson often lies).
're' put within 'fibs' is 'FIBRES'.
(Other definitions for fibres that I've seen before include "They may be spun" , "Threadlike structures" , "Threads or tendrils" , "thin strands or threads" , "Long thin substances, threads" .)