Take note: I cut bit of wood square — it’s all about practical details (9)
I believe the answer is:
logistics
'it's all about practical details' is the definition.
(logistics means organisation or practicalities)
'take note i cut bit of wood square' is the wordplay.
I cannot really understand how this works, but
'note' could be 'ti' (musical note as in do re mi fa so la ti) and 'ti' is found within the answer.
'i' is present in the answer.
'bit' could be 'o' (resembles 0, a binary digit or bit) and 'o' is present in the answer.
'square' could be 's' (abbreviation) and 's' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for logistics that I've seen before include "Art of military movement and supply" , "Task of movement and supply of troops" , "organisation" .)