Inserter

These 2 punch cards of clues can be answered and an "er" sound added to link them. The number at the end is the letter to extract from the final combined word

ex. The first left clue is Explosion with and answer of BOOM. It's matching right clue is Director Lee (7) with an answer of ANG. Combining with and "er" sound between gives the final answer of BOOMERANG, whose 7th letter to extract is A

Left Clue	Answer	Right Clue	Answer	Combined	Index	Extract
Explosion	BOOM	Director Lee	ANG	BOOMERANG	7	A
Hairless	BALD	Sprint	DASH	BALDERDASH	3	L
Singer Elliot	CASS	______ Miss	OLE	CASSEROLE	8	L
Kodos's pal	KANG	"Gross!"	EW	KANGAROO	7	O
Unit of power	WATT	Singer Rawls	LOU	WATERLOO	1	W
Tire inflator	PUMP	Half a dime	NICKEL	PUMPERNICKEL	4	P
Sum	ADD	Everything	ALL	ADDERALL	7	L
Clump up	MATT	Shofar	HORN	MATTERHORN	2	A
Taxi	CAB	Horse sound	NEIGH	CABERNET	1	C
Homer's wife	MARGE	Not out	IN	MARGARINE	9	E
Part of a set	REP	Conservative politician	TORY	REPERTORY	6	T
Actor's object	PROP	Brewed beverage	TEA	PROPERTY	3	O
Yammer	GAB	College administrator	DEAN	GABARDINE	6	D
Rocker's opposite	MOD	Octal base	EIGHT	MODERATE	4	E
Enthusiastic publicity	HYPE	Nintendo hero	LINK	HYPERLINK	3	P
Origin	SOURCE	Eels' Singer	E	SORCERY	2	O
Insult, informally	DIS	Egon's colleague	RAY	DISARRAY	3	S
Warsaw resident	POLE	Retinae location	EYES	POLARIZE	6	I
Ram	BUTT	Drinking vessel	CUP	BUTTERCUP	4	T

The extracted phrase is ALLOW PLACE TO DEPOSIT which is two clues, ALLOW, with an answer of LET, and PLACE TO DEPOSIT, with an answer of BANK. Adding an "er" sound between these two answers gives the final answer of LETTERBANK