Range for cooking crumpets (8)
I believe the answer is:
spectrum
'range' is the definition.
(a spectrum is a range or variety)
'cooking crumpets' is the wordplay.
'cooking' indicates an anagram (cook can mean to falsify or distort).
'crumpets' is an anagram of 'SPECTRUM'.
'for' acts as a link.
(Other definitions for spectrum that I've seen before include "range of tones" , "Range of colour produced by a prism" , "Range of colours, opinions etc" , "An entire range of related qualities of crumpets" , "Crumpets (anag)" .)