I have timber that's perfect (5)
I believe the answer is:
ideal
'perfect' is the definition.
(similar in meaning)
'i have timber' is the wordplay.
'have' says to put letters next to each other.
'timber' becomes 'deal' (deal is a kind of timber).
'i'+'deal'='IDEAL'
'that's' is the link.
(Other definitions for ideal that I've seen before include "Paragon" , "immaculate" , "Cutting/stabbing weapons" , "without a flaw" , "'Perfect, model (5)'" .)