Tot has trouble around new digital feature (10)
I believe the answer is:
fingernail
'digital feature' is the definition.
(a finger is a digit)
'tot has trouble around new' is the wordplay.
'tot' becomes 'finger' (both are small amounts of alcohol).
'has trouble' becomes 'ail' (I am not sure about this - if you are sure you should believe this answer much more).
'around' means one lot of letters goes inside another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'finger'+'ail'='fingerail'
'fingerail' going around 'n' is 'FINGERNAIL'.
(Other definitions for fingernail that I've seen before include "extreme protection results" , "One in ten" , "Part of hand" .)