Main problem, boofhead, is avaricious leaders in old South West Africa (7)
I believe the answer is:
namibia
'south west africa' is the definition.
(I've seen this before)
'main problem boofhead is avaricious leaders' is the wordplay.
'problem' indicates anagramming the letters.
'leaders' suggests taking the first letters.
The initial letters of 'boofhead is avaricious' is 'bia'.
'main' with letters rearranged gives 'nami'.
'nami'+'bia'='NAMIBIA'
'in old' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for namibia that I've seen before include "SW African country" , "part of Africa" , "Country in southern Africa" , "South West Africa" , "African country, capital Windhoek" .)