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' is an insertion indicator (inserted letters are consumed or drunk).
'can' becomes 'tin' (both are metal containers).
'lead to' suggests taking the first letters.
The first letter of 'group' is 'g'.
'tin'+'g'='ting'
'ale' enclosing 'ting' is 'ATINGLE'.
(Other definitions for atingle that I've seen before include "Being excited" , "shivery" , "Feeling thrilled" , "feeling prickly" , "quivering with delight?" .)