To rescue back, I have to be intentionally ambiguous (7)

I believe the answer is:

evasive

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'intentionally ambiguous' is the definition.
'evasive' can be an answer for 'ambiguous' (similar in meaning). I'm not certain of the 'intentionally' bit.

'to rescue back i have' is the wordplay.
'to rescue' becomes 'save' (saving is a kind of rescuing).
'back' says the letters should be written backwards.
'i have' becomes 'I've' (contraction of 'I have').
'save' written backwards gives 'evas'.
'evas'+'ive'='EVASIVE'

'to be' acts as a link.

Can you help me to learn more?

(Other definitions for evasive that I've seen before include "Shifty, slippery" , "Avoiding commitment" , "Shifty, equivocal" , "Not frank, shifty" , "Shifty, not direct in answering" .)

I've seen this clue in The Irish Independent.

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