Try short period with book (6)
I believe the answer is:
gospel
'book' is the definition.
(I've seen this before)
'try short period' is the wordplay.
'try' becomes 'go' (both can mean an attempt).
'short' means to remove the last letter.
'period' becomes 'spell' (spell can mean a period of time).
'spell' with its final letter taken away is 'spel'.
'go'+'spel'='GOSPEL'
'with' is the link.
(Other definitions for gospel that I've seen before include "Holy book" , "sacred text" , "Book by Matthew, Mark, Luke, or John" , "One in quartet" , "Evangel" .)