Harry aimed to get first rank, you must appreciate it (6)
I believe the answer is:
admire
'you must appreciate it' is the definition.
I can't judge whether this definition defines the answer.
'harry aimed to get first rank' is the wordplay.
'harry' indicates an anagram (harry can mean to attack or spoil).
'to get' is an insertion indicator.
'first rank' becomes 'r' (1st letter of 'rank').
'aimed' with letters rearranged gives 'admie'.
'admie' going around 'r' is 'ADMIRE'.
Can you help me to learn more?
(Other definitions for admire that I've seen before include "Respect and approve of" , "Regard with respect and approval" , "Have respect for, esteem" , "like very much" , "'Esteem, appreciate (6)'" .)