Means to escape, say, on steam ship (6)
I believe the answer is:
egress
This clue could be a double definition.
'means' is the first definition.
(I have seen 'Means of escape' mean 'egress' so perhaps 'means' could also mean 'egress')
'escape say on steam ship' is the second definition.
'egress' can be an answer for 'escape' (thesaurus). I am not certain of the 'say on steam ship' bit.
'to' is the link.
Can you help me to learn more?
(Other definitions for egress that I've seen before include "Way to escape" , "means of leaving" , "The act of going out" , "Taking leave" , "Emergence, coming out" .)