It's not hard to take, as in retrospect, the foreign offer is close to insane (6)
I believe the answer is:
edible
'it's not hard to take' is the definition.
I can't tell whether this defines the answer.
'in retrospect the foreign offer is close to insane' is the wordplay.
'in retrospect' is a reversal indicator.
'the foreign' becomes 'el' ('the' in Spanish).
'offer' becomes 'bid' (synonyms).
'is close to' says to take the final letters (the close/ending of).
The final letter of 'insane' is 'e'.
'el'+'bid'+'e'='elbide'
'elbide' reversed gives 'EDIBLE'.
'as' is the link.
Can you help me to learn more?
(Other definitions for edible that I've seen before include "Able to be eaten" , "Eatable" , "hoping dinner will be this?" , "Digestible" , "Like some mushrooms" .)