Mock launch (4,2)
I believe the answer is:
send up
This clue could be a double definition.
'mock' is the first definition.
(thesaurus)
'launch' is the second definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for send up that I've seen before include "Ridicule with satire" , "Satirise" , "skit" , "Parody (of something)" , "Make fun of or despatch aloft" .)