Crew's foreman's from Botswana, I suspect (9)
I believe the answer is:
boatswain
'crew's foreman's' is the definition.
'boatswain' can be an answer for 'foreman's' (thesaurus). I'm not sure about the 'crew's' bit.
'botswana i suspect' is the wordplay.
'suspect' is an anagram indicator.
'botswana'+'i'='botswanai'
'botswanai' with letters rearranged gives 'BOATSWAIN'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for boatswain that I've seen before include "sailor" , "4 [TEMPEST] character" , "Seaman" , "I'm chaired to work" , "who has a pipe with a mate?" .)