Trunk road primarily going on to Somalia (5)
I believe the answer is:
torso
'trunk' is the definition.
(synonyms)
'road primarily going on to somalia' is the wordplay.
'primarily' says to take the initial letters.
'going on' says to put letters next to each other.
'somalia' becomes 'so' (I can't justify this - if you can you should believe this answer much more).
The initial letter of 'road' is 'r'.
'r' after 'to' is 'tor'.
'tor'+'so'='TORSO'
Can you help me to learn more?
(Other definitions for torso that I've seen before include "Roost on trunk?" , "Main part of human body" , "Trunk, something unfinished" , "Piece of bronze" , "Roots (anag)" .)