Busy when given a ring? (7)
I believe the answer is:
engaged
This clue is a double definition.
'busy' is the first definition.
(similar in meaning)
'given a ring?' is the second definition.
(I've seen this before)
'when' acts as a link.
(Other definitions for engaged that I've seen before include "as a result of a proposal" , "Fully committed - to get married?" , "Busy, occupied" , "Started fighting" , "Hired; busy" .)