Dog compiler observed south of his glen, oddly (7,6)
I believe the answer is:
english setter
'dog' is the definition.
(English setter is an example)
'compiler observed south of his glen oddly' is the wordplay.
'compiler' becomes 'setter' (both can mean a writer of crosswords).
'observed south of' means one lot of letters go next to another (in a down clue, some letters go below others).
'oddly' is an anagram indicator.
'his'+'glen'='hisglen'
'hisglen' anagrammed gives 'english'.
'setter' after 'english' is 'ENGLISH SETTER'.
(Other definitions for english setter that I've seen before include "Breed of dog" , "Dog -- serenest light (anag)" , "One in white coat spotted" , "canine" , "man responsible for language exam" .)