Hope for as before, when I enter (6)
I believe the answer is:
aspire
'hope for' is the definition.
(thesaurus)
'as before when i enter' is the wordplay.
'before' says to put letters next to each other.
'when' becomes 'pre' (I can't explain this - if you can you should believe this answer much more).
'enter' means one lot of letters goes inside another.
'pre' going around 'i' is 'pire'.
'as'+'pire'='ASPIRE'
Can you help me to learn more?
(Other definitions for aspire that I've seen before include "Hope (to achieve)" , "Have lofty aims" , "Hanker" , "Earnestly desire (to achieve something)" , "Have ambition or desire for praise" .)