2.1.41 ध्वाङ्क्षेण क्षेपे

ध्वाङ्क्ष-indicating (insincere - like a crow)  सुबन्त in the sense of निन्दा have तत्पुरुष status. For example, तीर्थकाकः - since the inability of a crow to stay long at a pilgrimage is quite condemnable!