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' means one lot of letters go next to another.
'right' becomes 'r' (common abbreviation).
'gas' anagrammed gives 'ags'.
'ags' after 'r' is 'RAGS'.
(Other definitions for rags that I've seen before include "tabloids" , "Waste scraps of cloth" , "Tattered cloths" , "kids" , "Small bits of waste cloth" .)