Father seen in good sort of light (3)
I believe the answer is:
guv
'father' is the definition.
(both are terms of address for an older man)
'good sort of light' is the wordplay.
'good' becomes 'g' (abbreviation).
'sort of light' becomes 'uv' (short for ultraviolet light).
'g'+'uv'='GUV'
'seen in' is the link.
(Other definitions for guv that I've seen before include "Sir" , "Boss (inf.)" .)