Erica leaves second husband for the sun? (6)
I believe the answer is:
heater
'erica leaves second' is the definition.
I can't judge whether this defines the answer.
'husband for the sun?' is the wordplay.
'husband' becomes 'h' (abbreviation).
'for the sun?' becomes 'eater' (I am not sure about this - if you are sure you should believe this answer much more).
'h'+'eater'='HEATER'
Can you help me to learn more?
(Other definitions for heater that I've seen before include "Source of warmth; gun" , "Warming device" , "Room warmer" , "fire" , "Radiator" .)