Busy working even if drinking for example (2,3,2)
I believe the answer is:
on the go
'busy' is the definition.
(similar in meaning)
'working even if drinking for example' is the wordplay.
'working' becomes 'on' (e.g. a machine is working or on).
'even if' becomes 'tho'' (I've seen this in other clues).
'drinking' means one lot of letters goes inside another (inserted letters are consumed or drunk).
'for example' becomes 'e.g.' (short for 'exempli gratia', 'for example' in Latin).
'tho' going around 'eg' is 'thego'.
'on'+'thego'='ON THE GO'
(Other definitions for on the go that I've seen before include "ready to start monopoly?" , "Running around busily" , "Very busy, in constant motion" , "Ever busy" , "Busy and active" .)