Crossword Genius

Abundant firm and very good (7)

Ross

I believe the answer is:

copious

'abundant' is the definition.
(similar in meaning)

'firm and very good' is the wordplay.
'firm' becomes 'co' (a firm is a company).
'and' says to put letters next to each other.
'very good' becomes 'pious' (pious can mean very religious).
'co'+'pious'='COPIOUS'

(Other definitions for copious that I've seen before include "good measure" , "Plentiful, existing in large amounts" , "Many" , "Abundant in quantity" , "Abundant in supply" .)

I've seen this clue in The Globe and Mail.
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