Harry loves to do what you do (5)
I believe the answer is:
solve
'what you do' is the definition.
(I've seen this before)
'harry loves' is the wordplay.
'harry' is an anagram indicator (harry can mean to attack or spoil).
'loves' anagrammed gives 'SOLVE'.
'to do' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for solve that I've seen before include "Work out (a problem)" , "Explain (a mystery)" , "do crosswords" , "Find the answer to a mystery" , "Find the solution to puzzle or problem" .)