Insecure in shelter, Argentinian lady turned over (9)

I believe the answer is:

tentative

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'insecure' is the definition.
(thesaurus)

'shelter argentinian lady turned over' is the wordplay.
'shelter' becomes 'tent' (canvas shelter).
'argentinian lady' becomes 'evita' (I am not sure about the 'argentinian' bit.).
'turned over' shows that the letters should be reversed in order.
'evita' written backwards gives 'ative'.
'tent'+'ative'='TENTATIVE'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for tentative that I've seen before include "Hesitant; provisional" , "Attentive in hesitant manner" , "Cautious - provisional" , "Hesitant; not certain" , "Hesitant, cautious" .)

I've seen this clue in The Guardian.

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