Sam will shake up the timber factory (7)
I believe the answer is:
sawmill
'timber factory' is the definition.
'sawmill' can be an answer for 'factory' (factory where logs are sawn up). I'm not sure about the 'timber' bit.
'sam will shake up' is the wordplay.
'shake up' indicates anagramming the letters (I've seen 'shakes up' mean this).
'sam'+'will'='samwill'
'samwill' is an anagram of 'SAWMILL'.
'the' is the link.
Can you help me to learn more?
(Other definitions for sawmill that I've seen before include "Place where timber is cut into planks" , "should make a good deal" , "country establishment" , "Log cutting plant" , "Cutting workplace" .)