To try to obtain something by subtle indirect means: political manoeuvres, suggestion, etc.
Used other than figuratively or idiomatically: see angle, for.
To ingratiate; to obtain access to or introduce something by subtle, cunning or artful means.
To hint; to suggest tacitly (usually something bad) while avoiding a direct statement.
To creep, wind, or flow into; to enter gently, slowly, or imperceptibly, as into crevices.