Verrucas from upturned fodder (5)
I believe the answer is:
warts
'verrucas' is the definition.
('wart' can be a synonym of 'verruca')
'upturned fodder' is the wordplay.
'upturned' says the letters should be written backwards.
'fodder' becomes 'straw' (I've seen this in another clue).
'straw' back-to-front is 'WARTS'.
'from' acts as a link.
(Other definitions for warts that I've seen before include "Skin growths" , "Verrucas" , "unwanted lumps" , "feature prominently on 12,14 across [UGLY SISTERS]" .)