Reg ran to get the park keeper (6)
I believe the answer is:
ranger
'park keeper' is the definition.
(I've seen this before)
'reg ran to get' is the wordplay.
'ran' indicates anagramming the letters (letters have run around).
'to' becomes 'ran' (I can't justify this - if you can you should believe this answer much more).
'get' indicates putting letters inside.
'reg' is an anagram of 'ger'.
'ger' placed around 'ran' is 'RANGER'.
'the' is the link.
Can you help me to learn more?
(Other definitions for ranger that I've seen before include "Forest official" , "Park/forest keeper" , "Forestry official" , "Rover" , "Park warden" .)