Eastern philosophy embraced by Tibetan travellers (6)
I believe the answer is:
tantra
'eastern philosophy' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'embraced by tibetan travellers' is the wordplay.
'embraced' indicates the answer is hidden within the clue.
'TANTRA' is hidden within 'by tibetan travellers'.
(Other definitions for tantra that I've seen before include "Mystical Buddhist text" , "mystical writing" , "Religious writings" , "set of holy writings" , "Religious text" .)