Beef about rail chaos? (9)
I believe the answer is:
charolais
'beef' is the definition.
(Charolais is an example)
'about rail chaos?' is the wordplay.
'about' indicates anagramming the letters.
'rail'+'chaos'='railchaos'
'railchaos' anagrammed gives 'CHAROLAIS'.
(Other definitions for charolais that I've seen before include "Provider of beef" , "White breed of beef cattle" , "White beef-cattle" , "beast" .)