Father's bank is looking more unhealthy (7)

I believe the answer is:
pastier
'looking more unhealthy' is the definition.
I can't judge whether this defines the answer.
'father's bank' is the wordplay.
'father's' becomes 'pa's' (pa can mean dad or father).
'bank' becomes 'tier' (both can mean a row of similar things).
'pas'+'tier'='PASTIER'
'is' is the link.
Can you help me to learn more?
(Other definitions for pastier that I've seen before include "Less healthy-looking" , "paler" .)
