Journey across RSA — making this? (9)
I believe the answer is:
traversal
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'journey across rsa' is the wordplay.
'journey' becomes 'travel' (synonyms).
'across' means one lot of letters goes inside another.
'travel' going around 'rsa' is 'TRAVERSAL'.
'making' acts as a link.
Can you help me to learn more?
(Other definitions for traversal that I've seen before include "A journey across" , "Act of crossing" , "Coming across" , "Action of crossing" , "A crossing (of something)" .)