Interpolate

3 clues
Add words into
Add extraneous matter
Insert — not a reptile (anag)
Similar answers:
Abstractpointer
Accruedinterest
Acityinwinter
Activeinterests
Adinterim
Afewpointers
Allinoneprinter
Alongwintersnap
Aninterlude
Anointer
Arebluewinteris
Arielwinter
Aroseinwinter
Ataleofwinter
Atintervals
Autumnwinter
Aweekinwinter
Awinterplace
Bainter
Bestinterests