Holiday Collection No.77 Stinker

90d Nitrogen-rich crop-booster I have ---A

urea.

try asseverate and haute cuisine.

89a Indicate roughly I have AS--B-ate, ADUMBRATE
90d Nitrogen-rich crop-booster I have ---A, UREA
105a Ostentation, I have --L-T, ECLAT
210a Crosses, I have T-A-E-S-S, TRAVERSES
235a Fine Cooking, .....cuisine, I have -A-TE. HAUTE

53d SIGMOID gives you the D for adumbrate (though I would have preferred 'S shaped' to 'crescent shaped').

Hope that helps.

Thankyou so much for your help, there is no way I would have found them out myself.