Glaswegian couple cheers given whiskey to drink (3)
I believe the answer is:
twa
'glaswegian couple' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'cheers given whiskey to drink' is the wordplay.
'cheers given' becomes 'ta' (both can mean thank you. I am not sure about the 'given' bit.).
'whiskey' becomes 'W' (phonetic alphabet: alpha, bravo, charlie etc.).
'to drink' means one lot of letters goes inside another (some letters drink up others).
'ta' enclosing 'w' is 'TWA'.
Can you help me to learn more?
(Other definitions for twa that I've seen before include "pygmies" , "A couple of Scotsmen" , "pygmy" , "Organisation that used to provide flight" , "a couple in Edinburgh" .)