Shot drunk by good friend, broadly speaking (8)
I believe the answer is:
globally
'broadly speaking' is the definition.
Both the definition and answer are adverbs.
Maybe you can see a link between them that I don't see?
'shot drunk by good friend' is the wordplay.
'shot' becomes 'lob' (type of shot in eg tennis).
'drunk by' is an insertion indicator.
'good' becomes 'g' (abbreviation).
'friend' becomes 'ally' (an ally is a friend or supporter).
'g'+'ally'='gally'
'lob' going within 'gally' is 'GLOBALLY'.
Can you help me to learn more?
(Other definitions for globally that I've seen before include "Universally" , "Worldwide" , "all round the world" , "Across the whole world" .)