Frank is taken aback by online post (4)
I believe the answer is:
open
'frank' is the definition.
(synonyms)
'taken aback by online post' is the wordplay.
I cannot quite see how this works, but
'online' could be 'e' (as in e-mail or e-commerce) and 'e' is found within the answer.
'post' could be 'p' (abbreviation as in PS for postscript) and 'p' is found within the answer.
The remaining letters 'on' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'is' is the link.
Can you help me to learn more?
(Other definitions for open that I've seen before include "golf contest" , "Not enclosed" , "Uncovered" , "Frank and unlocked" , "Unfasten" .)
