Principal boy receives new cape (8)
I believe the answer is:
headland
'cape' is the definition.
(I've seen this before)
'principal boy' is the wordplay.
'principal' becomes 'head' (synonyms).
'boy' becomes 'land' ().
'head'+'land'='HEADLAND'
'receives new' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for headland that I've seen before include "Promontory, area jutting out into the sea" , "Ness" , "Promontory, territory jutting out into the sea" , "Narrow promontory" , "Bill" .)