Fashionable individual's a weak person, strangely atheistic (12)

I believe the answer is:

sophisticate

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'fashionable individual's' is the definition.
'sophisticate' can be an answer for 'individual's' (sophisticate is a kind of individual). I am unsure of the 'fashionable' bit.

'a weak person strangely atheistic' is the wordplay.
'a weak person' becomes 'sop' (I can't justify this - if you can you should believe this answer much more).
'strangely' is an anagram indicator.
'atheistic' anagrammed gives 'histicate'.
'sop'+'histicate'='SOPHISTICATE'

Can you help me to learn more?

(Other definitions for sophisticate that I've seen before include "Worldly-wise type" , "An experienced and knowledgeable person" , "refined person - with 8d,25a,22d" .)

I've seen this clue in The Times.

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