Helicopter, say, taking diner around Britain (3,6)
I believe the answer is:
egg beater
'helicopter' is the definition.
(egg beater can mean a helicopter in US English)
'say taking diner around britain' is the wordplay.
'say' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'taking diner' becomes 'eater' (to dine is to eat a meal. I am not sure about the 'taking' bit.).
'around' indicates putting letters inside.
'britain' becomes 'gb' (abbreviation for Great Britain).
'eg'+'eater'='egeater'
'egeater' enclosing 'gb' is 'EGG-BEATER'.
(Other definitions for egg beater that I've seen before include "Chef frequently uses this" , "Scrambling device" , "Canadian chopper" , "might be useful in the kitchen" , "Kitchen utensil" .)