Saturday Cryptic #7 - This theme's the pits

With 31a. Smallest family member returns extra small clothing in view of post office (3,2)

With 31a. Bax's Second Symphony arranged by biggest family member (4,3)

Nothing that's been repeated in Spanish covers is licensed to be sung on the 1st of July, in particular (1,6)

English writer goes after 'em on front page! (7)

With 15a & 17a. Working for NHL CEO's pension 9 to 5 - what a way to make a living! (Providing theme) (12,2,2,9)

Ensembles head off in new direction (2)

See 12a

See 12a

See 23a

Sort of magazine preferred by horny music fans? (4)

With 20a. Rapidly descending pianist nails endless composition (2,1,8)

Outspoken English Composer to make an unpleasant sound before collection of nations (5,7)

A variety of wind ensembles don't perform in C by the sounds of it (2,5)

Ice-cream maker removes hazardous shortening from order forms (7)

Take pot from your mouth (4)

Family name lent to 1A, 3A, 4D & 19D (3)

Principal organist slides in stops and takes a bow (6)

Olympian oddly fencing with upright instrument (5)

With 31a. Middle male loves being bound by duty to smaller family member (4,3)

Boater immediately takes in rawhide after bottom half dries up (5,3)

Transposed clarinet part leaves out critical first half of poppy line (8)

Directly and gently sheltered by outer base layer from low winds (7,6)

With 18d. Harsh words for failed percussionist about to be caned! (2,3,4,4,2,4,2)

Song's sounding a little stark (4)

Addresses in Arizona given in alphabetical order (1,2,1)

Fluffy side looks insignificant in a mirror (4)

See 8d

With 31a. Evergreen feller is in the possession of US production company supplying big guns to the theatre, or so we're told by bigger family member (8,3)

Colleges were once somewhere anyone can go (6)

German range made of reclaimed brass (4)

Lend assistance to English composer incorporating stretto (5)

Reformed con becomes addict (4)