Some strange things to come down with (3)
I believe the answer is:
get
'come down with' is the definition.
(synonyms)
'some strange things to' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'GET' can be found hidden inside 'strange things to'.
(Other definitions for get that I've seen before include "Procure from vegetables" , "Acquire" , "Escape" , "Procure or secure" , "Receive; obtain" .)