Gas about first right tabloids (4)
I believe the answer is:
rags
'tabloids' is the definition.
('rag' can be a synonym of 'tabloid')
'gas about first right' is the wordplay.
'about' indicates anagramming the letters.
'first right' becomes 'r' (1st letter of 'right').
'gas' anagrammed with 'r' makes 'RAGS'.
(Other definitions for rags that I've seen before include "tabloids" , "Waste scraps of cloth" , "Tattered cloths" , "kids" , "Small bits of waste cloth" .)