Pose can start with sacred sound in The Good Life , perhaps (6)
I believe the answer is:
sitcom
'the good life perhaps' is the definition.
'pose can start with sacred sound' is the wordplay.
'pose' becomes 'sit' (synonyms).
'start with' says to take the initial letters.
'sacred sound' becomes 'om' (mystic syllable in Hinduism).
The first letter of 'can' is 'c'.
'sit'+'c'+'om'='SITCOM'
'in' is the link.
(Other definitions for sitcom that I've seen before include "Kind of TV programme" , "Amusing TV programme" , "Humorous situation drama, in short" , "Friends, for example" , "Form of TV comedy" .)