Crossword Genius

A job so variable leads to abandonment of principles (8)

Ross

I believe the answer is:

apostasy

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

'abandonment of principles' is the definition.
'apostasy' can be an answer for 'abandonment' (apostasy is a kind of abandonment). I am not sure about the 'of principles' bit.

'a job so variable' is the wordplay.
'job' becomes 'post' (post is a kind of job).
'so' becomes 'as' (eg 'not as tall as me' means 'not so tall as me').
'variable' becomes 'y' (algebra).
'a'+'post'+'as'+'y'='APOSTASY'

'leads to' acts as a link.

Can you help me to learn more?

(Other definitions for apostasy that I've seen before include "defection" , "Abandonment of one's beliefs" , "Renunciation of a religious or political belief" , "abandoning principles" , "Desertion" .)

I've seen this clue in The Telegraph.
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