This is a hidden word - look for letters that are concealed within other words in the clue
The word 'reveals' is your indicator that something is hidden inside. Look at the letters contained within 'Badenoch reveals' - you need to extract a 5-letter sequence that's buried in there
Answer: OCHRE | Hidden word indicated by 'reveals' - the answer is concealed within [Baden]-OCHRE-[veals]. OCHRE is an iron oxide pigment, fitting the definition 'of iron'