No, neither that nor Nolvadex is a necessity in this matter. However such post-cycle ancillaries are helpful. Perhaps implicit in this perception ('they're only Pro-Hormones'---as in a sense) is the notion that for one, they are not beneficial, and for two, don't have the side-effects of "real-gear". The former statement and the latter, both false.
Certain given PH's in certain efficacious amounts will greet one will favourable results also carrying suppressive effects in tow (HPTA inhibition).
That aside, what is necessary is to keep calories high (above maintenance) and training volume lower come the post-cycle for several weeks. As well one may wish to dose an Ephedrine/Caffeine stack small and with greater frequency (5-10 mgs of E/50-100 mgs of C every 2-3 hours [two hours for the lower figure and three for the higher]).
On may, in lieu of Clomid/Nolvadex use Ergo's 6OXO anti-Aromatase. Also as may be helpful will be Avant's soon-coming 5AA intranasal IN-Rage or Ergo's Psycho-Diol products (as they will help strength and focus to keep company with you in the post-cycle period [and as they will only be used pre-workout, they will not make inroads into HPTA recovery]).
What's necessary and what's helpful are two considerations apart; however what's of aid can make one's life far more the easier.