A wine opened by old American gets you excited (7)
I believe the answer is:
aroused
'excited' is the definition.
(I know that excited can be written as aroused)
'a wine opened by old american gets' is the wordplay.
'wine' becomes 'red wine' (red is a type of wine).
'opened by' indicates putting letters inside (one word creates an opening in another word).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'american' becomes 'US' (abbreviation for United States).
'gets' means one lot of letters goes inside another.
'red' going around 'o' is 'roed'.
'roed' enclosing 'us' is 'roused'.
'a'+'roused'='AROUSED'
'you' is the link.
(Other definitions for aroused that I've seen before include "Woken - excited" , "Inspired" , "Keenly excited" , "Brought to" , "Excited, stimulated" .)