Develop good argument (4)

I believe the answer is:

grow

'develop' is the definition.
(growing is a kind of developing)

'good argument' is the wordplay.
'good' becomes 'g' (abbreviation).
'argument' becomes 'row' (I've seen this before).
'g'+'row'='GROW'

(Other definitions for grow that I've seen before include "Develop - propagate" , "Swell" , "Get bigger" , "Expand" , "Become bigger" .)

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

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