Centrally placed to get help around the end of term (4)
I believe the answer is:
amid
'centrally placed to' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'help around the end of term' is the wordplay.
'help' becomes 'aid' (synonyms).
'around' indicates putting letters inside.
'the end of' suggests the final letters.
The final letter of 'term' is 'm'.
'aid' going around 'm' is 'AMID'.
'get' acts as a link.
Can you help me to learn more?
(Other definitions for amid that I've seen before include "Within" , "'See . . . . the winter's snow' (carol)" , "Among" , "Amongst" , "Surrounded by" .)