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Picks out the fellow by the vessel showing shooting ability.(12)
M - - - S - - - - - - -
Support a small railway that's not of prime importance (9)
- - - - - - A - y
Emphasise the account requires money (6)
A - - - n -

SECONDARY and ACCENT seem to be two
of them,

marksmanship
secondary
accent

ou Rocketman and GHARBIJ IHN.