DYNAMIC DUOS I
Credit: GAMES Magazine - Aug. 1994
Stephen Sniderman

The same two consecutive letters can be inserted somewhere within each word in the pairs below to form two new words. For example, given the two clue pairs

TRUE     LEER
HOME    RING,

the consecutive letters DG could be added to  TRUE and LEER , forming TRUDGE and LEDGER.
Likewise, the consecutive letters AG could be added to HOME and RING to form HOMAGE and RAGING. The duos are never added at the beginning or end of words.

As a solving aid, each letter duo shares one missing letter with the duo from the preceding pair of words and the other missing letter with the next duo. In the example above, the letter G from the first pair is used in the second pair. The A in the second pair will be used in the third pair, and so on. This holds true for the first and last words in each set, which also share a letter. This allows you to solve  from the bottom up as well as from the top down. For example, the duo in the last pair of Set I, HALE and BAIT, must contain either a D or a G.

Set I
TRUE          LEER
HOME         RING
LENDER     TRAIL
TRIAL         LASH
SISTER        MARE
HALE          BAIT

Set II
GLOSSY      CAFE
DAM            ENTITY
COSMIC      DOUR
EARLY         LIE
BEND          TROPES
FRY              FLING

Set III
SEW            TOUGH
HAY             HOE
CANE          BRIE
SLAM         CARIES
BUS             TETHER
KNIT           BOUT

Answers:

Set I
TRUDGE         LEDGER
HOMAGE       RAGING
LAVENDER   TRAVAIL
TRIVIAL        LAVISH 
SINISTER      MARINE
HANDLE        BANDIT

Set II
GLOSSARY     CARAFE
DREAM            ENTIRETY
COSMETIC      DETOUR
EARTHY          LITHE
BEHIND           TROPHIES
FAIRY               FAILING

Set III
SHREW       THROUGH
HARDY       HORDE
CANDLE     BRIDLE
SLALOM    CALORIES
BOGUS       TOGETHER
KNIGHT     BOUGHT