1) Briskly 2) In a busy way 3) In an active manner 4) In an energetic way 5) Not passively 6) Vigorously 7) With genuine effort 8) With real effort Found on https://www.crosswordclues.com/clue/actively
• (adv.) In an active manner; nimbly; briskly; energetically; also, by one`s own action; voluntarily, not passively. • (adv.) In an active signification; as, a word used actively. Found on http://thinkexist.com/dictionary/meaning/actively/
Ac'tive·ly adverb 1. In an active manner; nimbly; briskly; energetically; also, by one's own action; voluntarily, not passively. 2. (Gram.) In an active signification; as, a word used actively . Found on http://www.encyclo.co.uk/webster/A/24