Informant pursues the plane shifting fodder (8,5)
I believe the answer is:
elephant grass
'fodder' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see a link between them that I don't see?
'informant pursues the plane shifting' is the wordplay.
'informant' becomes 'grass' (term for an informant or traitor).
'pursues' means one lot of letters go next to another.
'shifting' is an anagram indicator.
'the'+'plane'='theplane'
'theplane' anagrammed gives 'elephant'.
'grass' put after 'elephant' is 'ELEPHANT GRASS'.
Can you help me to learn more?
(Other definitions for elephant grass that I've seen before include "crop in Africa" , "plain diet" , "tall plant" , "source of paper" .)