Jump in front of queen's spaniel (8)
I believe the answer is:
springer
'spaniel' is the definition.
(springer spaniel is a kind of spaniel)
'jump in front of queen's' is the wordplay.
'jump' becomes 'spring' (synonyms).
'in front of queen' becomes 'er' (I can't justify this - if you can you should believe this answer much more).
'spring'+'er'='SPRINGER'
Can you help me to learn more?
(Other definitions for springer that I've seen before include "Large spaniel with wavy silky coat" , "Game dog" , "Type of spaniel" , "hound" , "Breed of spaniel" .)