Artificial heart can adapt (3,2)
I believe the answer is:
fit in
'adapt' is the definition.
Although both the answer and definition are verbs in their base form, I don't understand how they can define each other.
'artificial heart can' is the wordplay.
'heart' says to take the centre.
'can' becomes 'tin' (synonyms).
The central letters of 'artificial' are 'fi'.
'fi'+'tin'='FIT IN'
Can you help me to learn more?
(Other definitions for fit in that I've seen before include "Belong" , "Not be out of place" , "Make room or time for" , "Conform after adjustment" , "compatible" .)