Spectator 2596

[Matakari]

Good day, NACW, yes, but Fieldfare has bowled me with the last three.
Help would be appreciated, and thanks in advance!

21a Cattle pens leak regularly, I fume (7) : ?A??A?E
37a Cross and tense, Duke’s deputy (7) : ????EL?
1d Spotted picture of fern stalk around public library (7): S??????

[Matakari]

Thanks, NACW and Tilly2, I see it now and it's so obvious, I hang my head in shame! Hope next week will be better!

[Neveracrossword]

Thanks, Matakari. We all hit slumps from time to time, yours just seem to last a bit longer! I'm sure you'll come out fighting, ready and raring to go, on Thursday!