Learner with bold exterior gets sweetheart (7)
I believe the answer is:
darling
'sweetheart' is the definition.
(both are terms of address to romantic partner)
'learner with bold exterior' is the wordplay.
'learner with' becomes 'l' (I can't justify this - if you can you should believe this answer much more).
'bold' becomes 'daring' (I've seen this before).
'exterior' means one lot of letters goes inside another (some letters go on the outside of others).
'l' put inside 'daring' is 'DARLING'.
'gets' acts as a link.
Can you help me to learn more?
(Other definitions for darling that I've seen before include "lover" , "Australian tributary of the Murray River, sweetheart" , "Grace -, nineteenth century wreck heroine of lighthouse" , "Term of affection" , "family in play" .)