Delayed expert - I transacted amendment (14)
I believe the answer is:
procrastinated
'delayed' is the definition.
(procrastinating is a kind of delaying)
'expert i transacted amendment' is the wordplay.
'expert' becomes 'pro' (short for professional).
'amendment' indicates an anagram.
'i'+'transacted'='itransacted'
'itransacted' anagrammed gives 'crastinated'.
'pro'+'crastinated'='PROCRASTINATED'
(Other definitions for procrastinated that I've seen before include "delayed" , "Put off action" .)