Style of art that's in a seaman's territory (8)
I believe the answer is:
abstract
'style' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Maybe there's an association between them I don't understand?
'of art that's in a seaman's territory' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'that's in' means one lot of letters goes inside another.
'a seaman's' becomes 'abs' (short for able seaman).
'territory' becomes 'ct' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'art' anagrammed gives 'tra'.
'abs'+'ct'='absct'
'tra' placed within 'absct' is 'ABSTRACT'.
Can you help me to learn more?
(Other definitions for abstract that I've seen before include "Extract; summary" , "Rothko work?" , "Take away - immaterial" , "Summary (of an article)" , "Take away - theoretical" .)