Courteous staff will need to take it in (6)
I believe the answer is:
polite
'courteous' is the definition.
(similar in meaning)
'take it in' is the wordplay.
'take' becomes 'pole' (I am not sure about this - if you are sure you should believe this answer much more).
'in' indicates putting letters inside.
'pole' enclosing 'it' is 'POLITE'.
'staff will need to' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for polite that I've seen before include "Not rude" , "Civil and good-mannered" , "Of courteous manners" , "Cultivated" , "Mannerly, courteous" .)