Crossword Genius

As at the outset with development in egg? (6)

Ross

I believe the answer is:

ageing

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

'as at the outset with development in egg?' is the definition.
I can't tell whether this defines the answer.

'as at the outset with development in egg?' is the wordplay.
'at the outset' indicates taking the first letters.
'with' is a charade indicator (letters next to each other).
'development' indicates anagramming the letters.
The first letter of 'as' is 'a'.
'in'+'egg'='inegg'
'inegg' with letters rearranged gives 'geing'.
'a'+'geing'='AGEING'

Can you help me to learn more?

(Other definitions for ageing that I've seen before include "no longer fresh" , "rather old" , "Growing older" , "Elderly" , "process of development" .)

I've seen this clue in The Telegraph.
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