Sentence:  Vanessa took hold of his hand. ‘She′s a dear friend as well as my business manager and,' she giggled as she admitted her agent′s greatest flaw, ‘when it comes to her clients, the world′s biggest <WSD>stickybeak</WSD>.' 
Meaning of the word marked with <WSD> tags:  An overly inquisitive person, a nosey parker.