Draw slugs’ innards (3)
I believe the answer is:
lug
'draw' is the definition.
(thesaurus)
'slugs' innards' is the wordplay.
'innards' says to take the centre.
The middle of 'slugs' is 'LUG'.
(Other definitions for lug that I've seen before include "Drag, haul" , "Haul; ear (slang)" , "Drag with effort; ear" , "Drag or carry with effort" , "Carry with difficulty" .)