Join parade and collapse (4,2)
I believe the answer is:
fall in
This could be a double definition.
'join parade' is the first definition.
'fall in' can be an answer for 'join' (synonyms). I'm unsure of the 'parade' bit.
'collapse' is the second definition.
(I know that collapse can be written as fall in)
'and' is the link.
Can you help me to learn more?
(Other definitions for fall in that I've seen before include "Army order to take place in formation" , "Military order to join formation" , "Military command to take place in formation" , "Order to troops to take place in formation" , "get dressed?" .)