Across
Piece of music has magnificent opening (5)
Vitamin primarily alleviating discomfort if colic's bad (5,4)
Diligent help almost keeping couple united (9)
One on flight to watch carefully, we're told (5)
No Yankee reactionary has Socialist backing over there (6)
Enriched fruit drink, sophisticated sort (8)
Frantic partners put on odd bits of dress (10)
Retro science facility, source of medicinal lotion (4)
Marketeer's minimal stock purchased in Vienna (4)
Changed side for Lord's is fully updated (8,2)
Dispatch book left behind by somebody (8)
Bear to the left, reaching city's stall at fair (6)
Defective weight or, conversely, any number of grams (5)
Mum forming part of twosome getting spliced at sea? (4,5)
Freshly brewed tea missed cup (9)
Theologist invested in home improvements very little (5)
Down
Big Eddy's circumspect bids scuppered (9)
Child follows retreating gunners, firing irregularly (5)
Gothic gong I've improperly seized (8)
Small section of verse also fine on reflection (4)
Take time to record final? (4-6)
Court order restricting American patronage (6)
Runs into region where there's money maybe for pancake? (5-4)
Woeful setting for grand part of requiem (5)
Conclude activity on field to lure foxes (4,6)
Large pantry not yet full? (9)
Unnamed lady cleared out ground in routine manner (9)
Beaten cricket coach ultimately cheated (8)
Promising biographer's first title (6)
Cried like a corvid deprived of heart, so we hear (5)
Material lodged underneath piano (5)
Increase in price for walking tour (4)
Type letters or click words in the clue