Crossword Genius

Feed tablet to a rare form of butterfly? (11)

Ross

I believe the answer is:

caterpillar

I'm a little stuck... Click here to teach me more about this clue!

'form of butterfly?' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

'feed tablet to a rare' is the wordplay.
'feed' becomes 'cater' (I can't explain this - if you can you should give a lot more credence to this answer).
'tablet' becomes 'pill' (synonyms).
'rare' becomes 'r' (listed by Oxford Dictionary of Abbreviations).
'cater'+'pill'+'a'+'r'='CATERPILLAR'

Can you help me to learn more?

(Other definitions for caterpillar that I've seen before include "Track" , "potential beauty?" , "future monarch, perhaps" , "Butterfly/moth larva" , "Lepidopteran larva" .)

I've seen this clue in The Daily Mail.
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