Old church getting fifty in season? Wonderful! (9)

I believe the answer is:

excellent

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'wonderful' is the definition.

'old church getting fifty in season?' is the wordplay.
'old' becomes 'ex'.
'church' becomes 'ce' (abbreviation for Church of England).
'getting' says to put letters next to each other.
'fifty' becomes 'l' (roman numeral).
'in season?' becomes 'lent' (Lent is an example. I am not sure about the 'in' bit.).
'ex'+'ce'+'l'+'lent'='EXCELLENT'

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(Other definitions for excellent that I've seen before include "Superior, of the highest quality" , "Outstanding, very good" , "A-One" , "'Superior, first class (9)'" , "capital" .)

I've seen this clue in The Telegraph.

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