Packages gripping non-drinker in Waterloo, Stamford Bridge, say? (7)
I believe the answer is:
battles
'waterloo stamford bridge say?' is the definition.
(Waterloo and Stamford Bridge are examples)
'packages gripping non-drinker' is the wordplay.
'packages' becomes 'bales' (bale is a kind of package).
'gripping' means one lot of letters goes inside another.
'non drinker' becomes 'tt' (Teetotaller abbreviation).
'bales' placed around 'tt' is 'BATTLES'.
'in' acts as a link.
(Other definitions for battles that I've seen before include "Military engagements" , "Fights, conflicts" , "Lengthy conflicts" , "Military set pieces" , "Campaigns" .)