Another hearing actual TARDIS oddly stopping (7)
I believe the answer is:
retrial
'another hearing' is the definition.
(another legal hearing)
'actual tardis oddly stopping' is the wordplay.
'actual' becomes 'real' (synonyms).
'oddly' means one should take alternating letters (letters in the odd-numbered positions are used).
'stopping' means one lot of letters goes inside another (stopping can mean blocking a gap).
The alternating letters of 'tardis' are 'tri'.
'real' placed around 'tri' is 'RETRIAL'.
(Other definitions for retrial that I've seen before include "Further action" , "Hearing repeat" , "test, after failure in first" , "Second court hearing" , "Revived case" .)