I will get pine timber - it couldn't be better (5)
I believe the answer is:
ideal
'it couldn't be better' is the definition.
(I've seen this in another clue)
'i will get pine' is the wordplay.
'will get' is a charade indicator (letters next to each other).
'pine' becomes 'deal' (deal can mean wood as a building material).
'i'+'deal'='IDEAL'
'timber' acts as a link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for ideal that I've seen before include "Ailed (anag)" , "Perfect but not likely to become a reality" , "In her dreams" , "Benchmark" , "Perfect for the purpose" .)