Examined prisoner's passport to locate last ruby (10)
I believe the answer is:
'examined' is the definition.
The answer and definition can be both related to thinking as well as being past participle verbs.
Maybe you can see a link between them that I don't see?
'prisoner's passport to locate last ruby' is the wordplay.
'prisoner's' becomes 'con's' (abbreviation for 'convict').
'passport' becomes 'id' (a passport is identification).
'to' means one lot of letters go next to another.
'last' indicates one should take the final letters.
'ruby' becomes 'red' (synonyms).
The final letter of 'locate' is 'e'.
Can you help me to learn more?
(Other definitions for considered that I've seen before include "Deliberated" , "Looked at" , "Believed to be" , "Thought carefully about" , "respected" .)