Wonderful nurses name condition one has to face? (4)
I believe the answer is:
acne
'condition one has to face?' is the definition.
(spots on one's face)
'wonderful nurses name' is the wordplay.
'wonderful' becomes 'ace' (ace can informally mean very good).
'nurses' is an insertion indicator (nurse can mean to hold onto or harbour).
'name' becomes 'n' (common abbreviation e.g. on forms).
'ace' going around 'n' is 'ACNE'.
(Other definitions for acne that I've seen before include "Teenage skin blemish" , "Pimply ailment of adolescnce" , "Spotty coverage" , "Skin problem, mainly of teenagers" , "Cane for the teenager?" .)