Way to conduct dinosaur demo, horribly consuming pterodactyl's head (5,8)
I believe the answer is:
modus operandi
'way' is the definition.
(thesaurus)
'dinosaur demo horribly consuming pterodactyl's head' is the wordplay.
'horribly' is an anagram indicator (a horribly wrong version of the letters).
'consuming' is an insertion indicator.
'head' indicates taking the first letters.
The first letter of 'pterodactyl' is 'p'.
'dinosaur'+'demo'='dinosaurdemo'
'dinosaurdemo' with letters rearranged gives 'modusoerandi'.
'modusoerandi' enclosing 'p' is 'MODUS OPERANDI'.
'to conduct' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for modus operandi that I've seen before include "way of doing things" , "this shows how it's done" , "Method of working" , "Habitual procedure" , "Particular way of doing something (Latin)" .)