Cut off a certain length of the port facilities (8)
I believe the answer is:
dockyard
'port facilities' is the definition.
'dockyard' can be an answer for 'port' (thesaurus). I'm not sure about the 'facilities' bit.
'cut off a certain length of' is the wordplay.
I cannot quite see how this works, but
'cut' could be 'dock' (docking is a kind of cutting) and 'dock' is found in the answer.
'a' is within the answer.
'length' could be 'r' (r is a kind of length) and 'r' is found within the answer.
This explanation may well be incorrect...
'the' is the link.
Can you help me to learn more?
(Other definitions for dockyard that I've seen before include "part of Chatham once" , "naval establishment" , "Where does one export" , "Quayside" , "Base for ships" .)