No 11648, Saturday 12 Mar 2016, Exa

Across

5 Batting master-class (6) STREAM {MASTER*}
7 My steel is forged into a piece of armour (8) CORSELET {COR}{STEEL*}
9 No date after bachelor party (4) BAND {BA}{N}{D}
10 Site with guitar playing tips? (10) GRATUITIES {SITE+GUITAR}*
11 Differentiate 9sin(t)/cos(t) to solve for variable (12) INCONSISTENT {NINE+SIN+T+COS+T}*
13 A little toddler rolled a smoke? Shocking! (6) TRAGIC {TRA}{GIC<=} Anno not clear {Toddler}{RAGIC<=} See Comments
15 Follow men's fashion (6) TAILOR {TAIL}{OR} {TAIL}{OR}
18 Proof of business — business in a country (12) CONFIRMATION {CO}{N{FIRM}ATION}
21 Showing dislike towards popular PG houses (10)  PRESENTING {P{RESENT}{IN}G}
22 Change for 100 spent in an order (4) EDIT {EDIcT}
23 A male wild boar is heavenly food (8) AMBROSIA {A}{M}{BOAR+IS}*
24 Fly across through the borders (6) AVIATE {A}{VIA}{ThE}

Down

1 Reckless of the topless drunk lad to have gone around without drug (8) HEADLONG {tHE}{LAD*}{GONe}*
2 Admitting travel is about seeing friends (6) AMIGOS {AM}{I{GO}S}
3 Reason a crack's filled with cement (8) ARGUMENT {A}{R{GUM}ENT}
4 Leave for lunch in a bit (4,2) BEAT IT {B{EAT} IT}
6 Sports shoes for high terrains (8) TRAINERS {TERRAINS*}
7 Paragraph about a trainee engaged in work (6) CLAUSE {C{L}AUSE}
8 Watched river receding around the end of January (4) EYED {E{jan..Y}ED<=}
12 Immigrant: one on the street (8) COLONIST {COLON}{I}{ST}
14 Treat as St. John, one saving lives (8) CANONISE {CAN}{ON{IS}E}
16 Hernia, it's spreading — yes, it's spreading! (2,3,3) IN THE AIR {HERNIA IT}*
17 Fossil I carved yields an abundant mineral (6)  SILICA (T)
18 Fabulous actor's a controversial world figure (6) CASTRO {ACTOR S}*
19 Seduction of girl by mature woman is hot stuff (6) MAGMAS {MA{G}MA}{S}
20 Down drink in container (4) DRUM {D}{RUM}

Reference list

My=Cor, No=N, Date=D, Bachelor=BA, Men=OR(Ordinary Ranks), Business=Co, Business=Firm, Popular=In, 100=C, Male=M, Across=A, 
Through=Via,  Drug=E (Ecstasy), Trainee=L (Learner), River=Dee, One=I, Street=St, John=Can, Lives=Is, Girl=G, Down=D, Drink=Rum

Color/Font Scheme

Definition,Solution,Component letters,Anagram Indicator,C/C indicator,Reversal Indicator,Hidden word Indicator, Letter Pick indicator,Deletion Indicator,Homophone Indicator,Movement Indicator,Positional Indicator,Substitution Indicator

GRID