Broad, deep (5)
I believe the answer is:
thick
I believe this clue is a double definition.
'broad' is the first definition.
(associated in meaning)
'deep' is the second definition.
(I know that deep can be written as thick)
(Other definitions for thick that I've seen before include "But surely not all thieves are" , "Broad; dense" , "Stupid; close-packed" , "having such a head?" , "unintelligent?" .)