Post Office counter and safe to be put away (7)
I believe the answer is:
potable
'safe to be put away' is the definition.
I can't tell whether this defines the answer.
'post office counter' is the wordplay.
'post office' becomes 'po' (abbreviation).
'counter' becomes 'table' (I've seen this before).
'po'+'table'='POTABLE'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for potable that I've seen before include "fit to ingest" , "Fit to drink" , "may be drunk" , "having healthy water quality" , "Fit for drinking" .)