Perhaps one is turned up on wearing away of the soil (7)
I believe the answer is:
erosion
'away of the soil' is the definition.
I can't judge whether this definition defines the answer.
'perhaps one is turned up on wearing' is the wordplay.
'perhaps' indicates anagramming the letters.
'turned' is a reversal indicator.
'up on' becomes 'or' (I can't explain this - if you can you should believe this answer much more).
'wearing' is an insertion indicator.
'or' backwards is 'ro'.
'one'+'is'='oneis'
'oneis' is an anagram of 'esion'.
'esion' placed around 'ro' is 'EROSION'.
Can you help me to learn more?
(Other definitions for erosion that I've seen before include "Abrasion" , "Wearing away (of soil, rocks etc)" , "The wearing away by water or weather" , "Disintegration" , "Action of wearing away" .)