Crossword Genius

Metal rule (4)

Ross

I believe the answer is:

lead

I believe this is a double definition.

'metal' is the first definition.
(lead is a kind of metal)

'rule' is the second definition.
(thesaurus)

(Other definitions for lead that I've seen before include "Metal - van - go ahead" , "Guide; precede" , "Precede; element" , "Metal - wire" , "Leash -- Pb" .)

I've seen this clue in The Telegraph.
Want a hint initially instead of a full solution? Install my app