Press hour hosted by criminal gang (6)
I believe the answer is:
throng
'press' is the definition.
(I've seen this before)
'hour hosted by criminal gang' is the wordplay.
'hour' becomes 'hr' (abbreviation).
'hosted by' means one lot of letters goes inside another.
'criminal gang' becomes 'tong' (I have seen 'Chinese gang' mean 'tong' so perhaps 'gang' could also mean 'tong'. I am not sure about the 'criminal' bit.).
'hr' going inside 'tong' is 'THRONG'.
Can you help me to learn more?
(Other definitions for throng that I've seen before include "Large packed crowd" , "Large densely-packed crowd" , "Large numbers" , "A great crowd of people" , "A crowded mass of people" .)