Therapy that’s more pointed without special backing (5)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

(sp) IKIER (more pointed) [without special] reversed [backing]. When this answer showed up in the 15×15 on Monday of last week I noted that it had appeared here on 4 previous occasions and each time I had said I didn’t know it. Finally today I have remembered it!