Śrīmatī Rādhā is:

(1) vaidagdhya sindhuḥ – An ocean of cleverness.

This means rasa pāṇḍitya – She is learned in the science of taste.
She even teaches rasika śekhara, the king of relishers Śrī Kṛṣṇa, expertise in the amorous mellow.
Śrī Kṛṣṇa Himself admits in ‘Caitanya Caritāmṛta’:

rādhikāra prema – guru; āmi – śiṣya naṭa;
sadā āmā nānā nṛtye nācāye udbhaṭa

“Rādhikā’s love is the teacher and I am the dancing pupil. She always causes Me to dance different wonderful dances!”

She is the teacher of arts. Śrīla Rūpa Gosvāmī writes in ‘Ujjvala Nīlamaṇi’
(Rādhā Prakaraṇa 21):

ācārya dhātu citre pacana viracanā cāturī cāru cittā
vāg yuddhe mugdhayanti gurum api ca girāṁ paṇḍitā mālya gumphe
pāṭhe śārī-śukānāṁ paṭur ajitam api dyuti keliṣu jiṣṇur
vidyā vidyoti buddhiḥ sphurati rati kalāśālini rādhikeyam

Kundalatā told Gārgi: “O devi! What more can I say about the artful expertise of Śrī Rādhikā? She is the teacher by example of making pictures of mineral pigments
(Śrī Viśvanātha Cakravartīpāda writes in his ‘Ānanda Candrikā’-commentary on this verse: ācārya na tu kadācid api kasyacic chiṣya….evaṁ sarvatra jñeyam – “The word ācārya means that She did not learn this science from anyone, it was spontaneously manifest to Her”), She is expert in cooking, She can stifle even Śrī Kṛṣṇa in a verbal battle, She is very learned in stringing flower-garlands, She is expert in teaching the śāri and śuka-parrots how to recite beautiful verses, She can defeat even the unconquerable Ajita in the dicegame, and She has a keen intelligence.”

Because of Her cleverness, Śrīmatī is compared here with the ocean of sweet water (the seventh cosmic ocean).

tika to Sri Sri Radha Rasa Sudhanidhi, verse 18