Explorer Mike presumptuous coming into shelter (8)
I believe the answer is:
humboldt
'explorer' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'mike presumptuous coming into shelter' is the wordplay.
'mike' becomes 'M' (phonetic alphabet: alpha, bravo, charlie etc.).
'presumptuous' becomes 'bold' (I've seen this in another clue).
'coming into' is an insertion indicator.
'shelter' becomes 'hut' (hut is a kind of shelter).
'm'+'bold'='mbold'
'mbold' put within 'hut' is 'HUMBOLDT'.
Can you help me to learn more?
(Other definitions for humboldt that I've seen before include "Alexander von --, German explorer" , "Cold ocean current" .)