The most common and most likely answer to this crossword clue is the 5 letter word BWANA
I've seen this crossword clue in Financial Times
B
W
A
N
A
More clues leading to the result BWANA
- Sailor stood up to embrace washed-out master from East Africa
- Pasty consumed by graduate master in Africa
- Bishop of pale complexion, a respected white man once?
- Old master, pale and sickly, nursed by graduate
- Intoxicated nawab becomes boss in Kenya
- Mostly poor, welcoming white master in Africa
- White breaks second-rate centre of Grand Master
Buddy explains!

The straight part
We know that "master in Africa" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case master in africa = bwana.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does BWANA mean?
BWANA noun- Big boss, important person.