All the same, these letters suggest a basic education (3,5,2)
I believe the answer is:
the three rs
'a basic education' is the definition.
(the three R's are reading, writing and arithmetic)
'all the same these letters suggest' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'the' is 'het' which is within the answer.
The remaining letters 'threers' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for the three rs that I've seen is " It's kids' stuff".)