Old American jailed there? (5)
I believe the answer is:
incan
This clue could be a double definition.
'old american' is the first definition.
(I've seen this before)
'jailed there?' is the second definition.
The answer and definition are different parts of speech. However, adjectives and past participle verbs can occasionally define each other.
Can you help me to learn more?
(Other definitions for incan that I've seen before include "about S American Indians" , "See old South American" , "Relating to ancient South Americans" , "Of an Andean civilisation overthrown by Pizarro in 1533" , "doing time?" .)