Beer drinking can lead to group feeling excited (7)
I believe the answer is:
atingle
'feeling excited' is the definition.
'beer drinking can lead to group' is the wordplay.
'beer' becomes 'ale' (type of beer).
'drinking' indicates putting letters inside (inserted letters are consumed or drunk).
'can' becomes 'tin' (both are metal containers).
'lead to' indicates taking the first letters.
The first letter of 'group' is 'g'.
'tin'+'g'='ting'
'ale' placed around 'ting' is 'ATINGLE'.
(Other definitions for atingle that I've seen before include "Being excited" , "shivery" , "Feeling thrilled" , "feeling prickly" , "quivering with delight?" .)