Honour girl crossing over the hill and sea (4,5)
I believe the answer is:
gold medal
'honour' is the definition.
(I know that gold medal is a honour)
'girl crossing over the hill and sea' is the wordplay.
'girl' becomes 'gal'.
'crossing' indicates putting letters inside (to cross can mean to go over or around).
'over the hill' becomes 'old' (I've seen this in another clue).
'and' says to put letters next to each other.
'sea' becomes 'med' (abbreviation of Mediterranean).
'old'+'med'='oldmed'
'gal' placed around 'oldmed' is 'GOLD MEDAL'.
(Other definitions for gold medal that I've seen before include "Possible alternative to cup" , "Victor may get one" , "top award" , "prize for winning" , "Award for Olympic winner" .)