Heading for Bugaba close to border in part of Panama (4)
I believe the answer is:
brim
'part of panama' is the definition.
'brim' can be an answer for 'part' (I have seen 'Part of hat ' mean 'brim' so perhaps 'part' could also mean 'brim'). I'm not sure about the 'of panama' bit.
'heading for bugaba close to border' is the wordplay.
'heading for' suggests taking the first letters.
'close to' means one lot of letters go next to another.
'border' becomes 'rim' (I've seen this before).
The first letter of 'bugaba' is 'b'.
'b'+'rim'='BRIM'
'in' is the link.
Can you help me to learn more?
(Other definitions for brim that I've seen before include "Lip; part of 6 Down" , "Top edge of a container" , "Top edge of cup etc" , "Circumference" , "Be full; edge of hat" .)