National Trust's originator raised capital abroad (5)
I believe the answer is:
tamil
'national' is the definition.
'trust's originator raised capital abroad' is the wordplay.
'originator' indicates taking the first letters (I've seen 'originators' mean this).
'raised' is a reversal indicator.
'capital abroad' becomes 'lima' (capital of Peru).
The initial letter of 'trusts' is 't'.
'lima' back-to-front is 'amil'.
't'+'amil'='TAMIL'
(Other definitions for tamil that I've seen before include "Perhaps Indian" , "Southern Indian language" , "South Indian people or language" , "Member of South Indian people" , "One in race" .)