Crossword Genius

Last month removing pet I have that's unreliable (9)

Ross

I believe the answer is:

deceptive

'unreliable' is the definition.
(thesaurus)

'last month removing pet i have' is the wordplay.
'last month' becomes 'dec'.
'removing' indicates anagramming the letters (moving the letters again).
'i have' becomes 'ive'.
'pet' anagrammed gives 'ept'.
'dec'+'ept'+'ive'='DECEPTIVE'

'that's' acts as a link.

(Another definition for deceptive that I've seen is " Misleading".)

I've seen this clue in The Telegraph.
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