Beliefs in the empty traps (6)
I believe the answer is:
tenets
'beliefs' is the definition.
('tenet' can be a synonym of 'belief')
'the empty traps' is the wordplay.
'empty' suggests removing the centre.
'traps' becomes 'nets' (net is a kind of trap).
'the' with its centre taken out is 'te'.
'te'+'nets'='TENETS'
'in' is the link.
(Other definitions for tenets that I've seen before include "gnomes?" , "Canons and creeds" , "Firm beliefs or doctrines" , "'Beliefs, dogmas (6)'" , "Doctrines of belief" .)