Crossword Genius

Old fellow adjusted his fly in a cool way (8)

Ross

I believe the answer is:

offishly

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'in a cool way' is the definition.
I can't tell whether this definition defines the answer.

'old fellow adjusted his fly' is the wordplay.
'old' becomes 'o' (abbreviation).
'fellow' becomes 'F' (abbreviation - of a society etc.).
'adjusted' is an anagram indicator.
'his'+'fly'='hisfly'
'hisfly' anagrammed gives 'fishly'.
'o'+'f'+'fishly'='OFFISHLY'

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I've seen this clue in The Independent.
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