Capital support from senior teacher and the others (8)
I believe the answer is:
headrest
'capital support' is the definition.
'headrest' can be an answer for 'support' (headrest is a kind of support). I am not certain of the 'capital' bit.
'senior teacher and the others' is the wordplay.
'senior teacher' becomes 'head' (headteacher).
'and' is a charade indicator (letters next to each other).
'the others' becomes 'rest' (other people are the rest).
'head'+'rest'='HEADREST'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for headrest that I've seen before include "Support on car seat" , "Capital supporter" , "Chair back support" , "Support of top of chair" , "What may reduce whiplash" .)