Cryptic crossword abbreviations

Setters love to turn a word into one or two letters. 'Sailor' becomes AB, 'love' becomes O, 'about' becomes C or RE. Once you know the regulars, a lot of clues fall into place.

LettersClued by
Aone, ace, answer, about (approx.), article, first-class
ABsailor, able seaman
Bbachelor, born, book, bishop (chess), black (pencil)
Cabout (circa), hundred, caught, cold, conservative, century, carbon
CEchurch, Church of England
CHchurch, companion of honour
Ddaughter, died, old penny, 500, Democrat
DRdoctor, drive, debtor
Eeast, energy, ecstasy, English, European, key (music)
Ffemale, fine, loud (forte), Fahrenheit, following
Ggood, grand, gravity, gram, key (music)
GIsoldier, American soldier
GPdoctor, general practitioner
Hhospital, hot, hard (pencil), husband, hydrogen, hour
Ione, island, iodine, current
Kthousand, king (chess), kilo, potassium
Llearner, student, left, large, pound, lake, 50, Liberal
LE, LA, LESthe (French)
Mmarried, male, thousand, metre, mile, motorway, Monsieur
MOdoctor, medical officer, moment, second
Nnorth, new, knight (chess), noun, nitrogen
Olove, nothing, zero, ring, round, circle, oxygen, old
ORmen, soldiers, other ranks, gold (heraldry)
Ppage, penny, pence, quiet (piano), parking, phosphorus
PEexercise, physical education
Qqueen, question
Rright, river, king (rex), queen (regina), rook (chess), run
RAartist, gunners, Royal Academy
REabout, concerning, on, religious education, engineers, soldiers
RNnavy, sailors, Royal Navy
Ssouth, son, small, second, saint, shilling
SSship, steamship, saints
STsaint, street, stone, way
Ttime, ton, tee, junction (T-junction)
TAthanks, volunteers, Territorial Army
TARsailor, Jack
Uupper-class, posh, university, universal (film), uranium
Vfive, very, versus, against, verse, volt
Wwest, wife, with, women, watt
Xten, kiss, cross, times, unknown
Yyard, year, unknown, yen
Zzero, unknown