John ---- (1513-72), Scottish Protestant reformer (4)

Lateral spread of an aircraft or aerial creature (8)

Most-populous city of Illinois, the third-largest in the USA (7)

Lowest deck on ship, above the hold (5)

Gershwin's vehicle for Fred Astaire and Ginger Rogers (1937) (5,2,5)

Buff: stir up (3)

Umbilicus: central point (5)

Gee-gee? (3)

Sentence of a court not involving imprisonment (3-9)

City and province of Spain, birthplace of St Teresa (5)

Pronounceable word or name formed from initial letters of others (7)

Indian diamond, part of the British Crown Jewels since 1849 (3-1-4)

Make a fuss: sea mist (4)

Commences a game of rugby or football (5,3)

Spiritual board (5)

Nigerian native whose tribe was in the majority in Biafra at the time of the 1967-70 conflict (3)

Crawl; grovel (2,2,3,5)

Aquatic bird which gives Louisiana its nickname (7)

Back side (scruff) of the neck (4)

Severe hindrance or crippling encumbrance (4,3,5)

Simply, 'the King' of Rock and Roll? (5)

Disqualification of a particular demographic from doing something (3,5)

Hotline? (anag) (7)

Relating to the soul, mind or spirit (5)

Take pleasure; lie in warmth or sunshine (4)

Bother; song and dance (3)