Criminal's partner from America caught a slug? (7)
I believe the answer is:
mollusc
'a slug?' is the definition.
(slug is a kind of mollusc)
'criminal's partner from america caught' is the wordplay.
'criminal's partner' becomes 'moll' (I can't explain this - if you can you should give a lot more credence to this answer).
'from america' becomes 'us'.
'caught' becomes 'c' (cricket abbreviation).
'moll'+'us'+'c'='MOLLUSC'
Can you help me to learn more?
(Other definitions for mollusc that I've seen before include "Creature such as a snail or mussel" , "Kind of animal - slug or octopus" , "Type of invertebrate" , "Invertebrate that often has shell" , "Creature with soft body and hard shell like snail" .)