TV detective going inside meanwhile, wisely (5)
I believe the answer is:
lewis
'tv detective' is the definition.
(Sergeant Lewis, colleague of Inspector Morse)
'going inside meanwhile wisely' is the wordplay.
'going inside' says the answer is hidden in the clue.
'LEWIS' can be found hidden inside 'meanwhile wisely'.
(Other definitions for lewis that I've seen before include "Part of Hebridean island - boxer" , "our 1/4 Across [GOLD MEDALLIST] in 2000" , "Scottish island" , "C. S. ---, --- Carroll, authors" , "Police sergeant" .)