Crossword Genius

Toil with same ground that is most fertile (8)

Ross

I believe the answer is:

loamiest

'is most fertile' is the definition.

'toil with same ground' is the wordplay.
'with' is a charade indicator (letters next to each other).
'ground' indicates anagramming the letters ('grind' the letters into a new form).
'toil'+'same'='toilsame'
'toilsame' anagrammed gives 'LOAMIEST'.

'that' acts as a link.

I've seen this clue in The Telegraph.
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