Ocean after the tracks initially in mind — on this? (4,5)
I believe the answer is:
boat train
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'ocean after the tracks initially in mind' is the wordplay.
'initially' suggests taking the first letters.
'in' indicates putting letters inside.
'mind' becomes 'brain' (synonyms).
The initial letters of 'ocean after the tracks' is 'oatt'.
'oatt' placed inside 'brain' is 'BOAT-TRAIN'.
'on' acts as a link.
Can you help me to learn more?
(Other definitions for boat train that I've seen before include "connecting transport" , "that runs down track to harbour" , "Transport to/from docks" , "One may be heading for a port" .)