Pole with blade died, restrained by cleaner in executive suite (9)
I believe the answer is:
boardroom
'cleaner in executive suite' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'pole with blade died restrained' is the wordplay.
'pole with' becomes 'broom' (I am not sure about this - if you are sure you should believe this answer much more).
'blade' becomes 'oar' (blade is the word for oar in competitive rowing).
'died' becomes 'd' (abbreviation next to the year of someone's death).
'restrained' means one lot of letters goes inside another (inserted letters are restrained by others).
'oar'+'d'='oard'
'broom' placed around 'oard' is 'BOARDROOM'.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for boardroom that I've seen before include "executive apartment" , "top management" , "venue for business meeting" , "Directors collectively" .)