I have three which I am stuck with.
14d. Serving to delay or slow down a chemical reaction (9). R?T?R?A??
25a. Increase the costs or risks involved in some action (coll) (2,3,4) L?T?E?N?E
26a In the armed services, a euphemism meaning nothing at all (5,5,5) S?E???S?M?A?A?S
Hope someone can help please.