Thor desperate to include crowd (5)
I believe the answer is:
horde
'crowd' is the definition.
(I know that horde is a type of crowd)
'thor desperate to include' is the wordplay.
'to include' says the answer is hidden in the clue.
'HORDE' can be found hidden inside 'thor desperate'.
(Other definitions for horde that I've seen before include "A moving crowd" , "A mob of people" , "Large crowd" , "Large group of people" , "Nomadic army" .)