Adhesive to fix a step (5)
I believe the answer is:
paste
'adhesive' is the definition.
(I know that paste is a type of adhesive)
'fix a step' is the wordplay.
'fix' is an anagram indicator.
'a'+'step'='astep'
'astep' anagrammed gives 'PASTE'.
'to' is the link.
(Other definitions for paste that I've seen before include "sound beating" , "Fix with adhesive" , "(In computing) insert text into a document" , "Creamy, sticky, or doughy mixture" , "Liquid glue" .)