Get Sid to make a summary (6)
I believe the answer is:
digest
'a summary' is the definition.
(I've seen this before)
'get sid to make' is the wordplay.
'to make' indicates anagramming the letters.
'get'+'sid'='getsid'
'getsid' with letters rearranged gives 'DIGEST'.
(Other definitions for digest that I've seen before include "Periodical summarizing the news" , "Synopsis" , "Gradually come to understand" , "abstract" , "Break down in the stomach" .)