Get agitated with return of dry theatre (7)
I believe the answer is:
perturb
'get' is the definition.
(thesaurus)
'return of dry theatre' is the wordplay.
'return of' says the letters should be written in reverse.
'dry' becomes 'brut' (type of wine).
'theatre' becomes 'rep' (repertory theatre).
'brut'+'rep'='brutrep'
'brutrep' backwards is 'PERTURB'.
'agitated with' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for perturb that I've seen before include "Worry" , "Disquiet, disturb" , "Disturb - trouble" , "Opera star" , "Make unsettled" .)