Crossword Genius

Like pork pie, having ground nut and herb (6)

Ross

I believe the answer is:

untrue

I'm a little stuck... Click here to teach me more about this clue!

'like pork pie having' is the definition.
I can't tell whether this definition defines the answer.

'ground nut and herb' is the wordplay.
'ground' is an anagram indicator ('grind' the letters into a new form).
'and' is a charade indicator (letters next to each other).
'herb' becomes 'rue' (rue is a herb).
'nut' is an anagram of 'unt'.
'unt'+'rue'='UNTRUE'

Can you help me to learn more?

(Other definitions for untrue that I've seen before include "Not loyal" , "Spurious" , "like the magnetic north?" , "Not faithful" , "Incorrect or false" .)

I've seen this clue in The Times and The Sunday Times.
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