Farm animal solver picked up? (3)
I believe the answer is:
ewe
'farm animal' is the definition.
(female sheep)
'solver picked up?' is the wordplay.
'solver' becomes 'you' (the person solving the clue!).
'picked up?' indicates a 'sounds like' (homophone) clue (I've seen 'picked up' mean this).
'you' sounds like 'EWE'.
(Other definitions for ewe that I've seen before include "Wool supplier" , "Ram's partner?" , "21a [SHEEP]" , "A palindromic sheep" , "Scottish loch" .)