Person like Linnaeus, one without cover crossing a lake (10)
I believe the answer is:
naturalist
'person like linnaeus' is the definition.
(Carl Linnaeus was a naturalist)
'one without cover crossing a lake' is the wordplay.
'one without cover' becomes 'naturist' (I can't justify this - if you can you should believe this answer much more).
'crossing' means one lot of letters goes inside another (to cross can mean to go over or around).
'lake' becomes 'L' (geographical abbreviation).
'a'+'l'='al'
'naturist' going around 'al' is 'NATURALIST'.
Can you help me to learn more?
(Other definitions for naturalist that I've seen before include "Zoologist" , "Zoology expert possibly" , "one's studying in the wild" , "One who studies animals and plants" , "Darwin?" .)