Some Anglo-Costa Rican train engine? (4)

I believe the answer is:

loco

I'm a little stuck... Click here to teach me more about this clue!

'train engine?' is the definition.
'loco' can be an answer for 'engine?' (I've seen this before). I am not certain of the 'train' bit.

'some anglo-costa rican' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'LOCO' is hidden in the letters of 'anglo costa rican'.

Can you help me to learn more?

(Other definitions for loco that I've seen before include "Transport" , "Crazy; engine" , "Barmy (Spanish) - engine (abbr)" , "Engine (abbrev.)" , "Engine - nuts" .)

I've seen this clue in the Sydney Morning Herald.

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