1a Pile up tins for fish-eaters (8)
4d He can't go on only ordering creation of tiny things (14)
9d Grew ponytail to supply admission of error (7,7)
27a Where Charlotte's often seen to be fancy (2,6)
Muchas gracias ...
1a Pelicans - anag 'pile' + 'cans'
4d Nanotechnology - anag 'he cant go on only'
9d Written apology - anag 'grew ponytail to'
27a By George (fancy!) - Princess Charlotte & Prince George