The most common and most likely answer to this crossword clue is the 6 letter word LUCERN
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The straight part
We know that "Fodder for cattle" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fodder for cattle = lucern.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does LUCERN mean?
LUCERN noun- A lamp.
- Alfalfa.
- A sort of hunting dog.
- An animal whose fur was formerly much in request (by some supposed to be the lynx); also spelled lusern or luzern.