Crush of people to see actor's bottom in dirty film (5)
I believe the answer is:
scrum
'crush of people' is the definition.
'scrum' can be an answer for 'crush' (I've seen this before). I am not sure about the 'of people' bit.
'actor's bottom in dirty film' is the wordplay.
'bottom' suggests the final letters.
'in' means one lot of letters goes inside another.
'dirty film' becomes 'scum' (I've seen this in another clue).
The last letter of 'actor' is 'r'.
'r' going inside 'scum' is 'SCRUM'.
'to see' acts as a link.
Can you help me to learn more?
(Other definitions for scrum that I've seen before include "Forwards at rugby union" , "Disorderly struggle" , "Melee" , "Rugby pack" , "Disorderly crowd" .)